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Foil at Camera Bracket (Original MacBook Model)

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc381.jpg

Procedure

1.Note the placement of the foil strip that attaches to the camera bracket with an adhesive
backing.
2.Using a black stick, carefully peel up the foil strip.

mc382.jpg

3.Position the replacement foil strip so that its round opening does not block any part of the
round area for the microphone.

mc383.jpg

4.Lightly tap down on the foil so it adheres completely to the camera bracket..

mc384.jpg

5.Peel up the adhesive paper so that the foil remains on the camera bracket.

mc385.jpg

6.Reassemble and test the computer.

Spacers at Camera Bracket

Tools

Preliminary Steps

Before you begin, remove

Part Location

 mc386.jpg

Procedure

1.Note the placement of the four thin, clear strips that attach to the camera bracket with
double-sided adhesive.
2.Using a black stick, remove the four strips.
mc387.jpg

Replacement Note:  Position the replacement adhesive strips so that they extend slightly
over the camera bracket but do not overlap the outer edge of the display rear housing.

mc401.jpg

3.Install the replacement camera spacers, and reassemble and test the computer.

Camera Assembly

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc389.jpg

Procedure

1.With the LCD panel face-down on a clean, soft cloth, disconnect the USB camera cable (pull
the connector straight down).

2.Remove the two 2-mm long screws from the camera board.

mc390.jpg

3.Tilt up the camera board and use a black stick to gently pry up the microphone cable gasket
from the panel frame.

mc391.jpg

Replacement Note: Make sure the microphone gasket fts snug in the frame and that the
microphone cable runs along the top of the camera frame before installing the screws.

mc392.jpg

4.Peel up the single strip of tape that holds the microphone cable in place at the camera
bracket.

mc393.jpg

Replacement Note: Be sure to install a replacement strip of tape to hold the microphone
cable in place and keep the cable away from areas where it could be pinched when the
panel is reinstalled. Make sure the tape wraps around to the front of the camera bracket.

mc394.jpg

5.Hold the LCD panel assembly upright so you can access the two 3-mm long screws that
secure the camera bracket to the top of the LCD panel. Remove the two screws.

mc395.jpg

6.Lift of the camera bracket from the locator pins on the bezel braces. Do not remove the
camera board from the bracket. 

mc396.jpg

7.Install the replacement camera assembly, and reassemble and test the computer.

mc397.jpg

Replacement Note: The camera assembly includes:

Replacement Note: Be sure to reinstall the microphone in the gasket before securing the 
2-mm long camera board screws.

mc398.jpg

Replacement Note: When reinstalling the USB line, no copper contacts should be visible.
Reinstall the cable if you can see copper contacts.

mc399.jpg

mc400.jpg

LVDS Cable with USB Line

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc431.jpg

Procedure

1.Note the placement of the strips of tape that secure the LVDS cable and the USB line to the
LCD panel.

mc403.jpg

2.Because the protective sheath for the fex cables can be delicate, use light pressure to hold
the cables in place as you carefully peel up the strips of tape just enough to free the cables. 

mc404.jpg

3.Disconnect the LVDS cable by pulling the connector straight down from the connector on
the LCD panel. 

mc405.jpg

4.Disconnect the USB line by using a black stick and your fngernail to slide the connector
straight down from the camera board. 

mc406.jpg

Replacement Note: When reinstalling the USB line, no copper contacts should be visible.
Reinstall the cable if you can see copper contacts.
•  Wrong

mc407.jpg

•  Right

mc408.jpg

5.Remove the LVDS cable from the panel, and unwrap the black tape that secures the cable to
the microphone cable. 

mc409.jpg

Replacement Note: Whenever the microphone cable is to be separated from the LVDS cable,
use a permanent marking pen to mark the microphone cable. Marking the cable where the
strips of conductive tape overlap the microphone cable provides a guide for reassembly.

mc410.jpg

6.Install the replacement LVDS cable with USB line, and reassemble and test the computer.

mc411.jpg

Late 2006 Model Replacement Note: For the Late 2006 model, there are three possible
panel manufacturers: AUO, Chi Mei, and Samsung. Refer to the following table when
replacing the LVDS cable or LCD panel:

panel logo as shown in the table to order the appropriate LVDS cable (922-7889 or 922-
7890).

conductive tape that comes bundled in the 661-4211 kit. (Do not order a separate LVDS
cable.)

mc412.jpg

Microphone Cable

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc413.jpg

Procedure

1.Note the routing of the microphone cable as it runs along the right edge of the LCD panel.

mc414.jpg

2.Pull up the cable from the routing tabs.

mc415.jpg

3.Peel up the single strip of tape that holds the microphone cable in place at the camera
bracket.

mc416.jpg

Replacement Note: Be sure to install a replacement strip of tape to hold the microphone
cable in place and keep the cable away from areas where it could be pinched when the
panel is reinstalled. Make sure the tape wraps around to the front of the camera bracket.

mc417.jpg

4.Remove the two 3-mm long screws from the camera board.

mc418.jpg

5.Without straining the camera board cable, carefully tilt up the camera board to access the
microphone that is ftted into the opening in the camera bracket.

mc419.jpg

6.Use a black stick to pull up the microphone from the gasket.

mc420.jpg

Replacement Note: Install the microphone in the gasket and use a black stick to press it
down so it is level with the edge of the gasket.

mc421.jpg

7.Unwrap the black tape that secures the microphone cable with the LVDS cable.

mc422.jpg

8.Replacement Note: Whenever the microphone cable is to be separated from the LVDS cable,
use a permanent marking pen to mark the microphone cable. Marking the cable where the
strips of conductive tape overlap the microphone cable provides a guide for reassembly.

mc423.jpg

9.Install the replacement microphone cable, and reassemble and test the computer.

mc424.jpg

Important: Where the microphone cable exits the display rear housing, the microphone
cable must be pulled taught within the cable bundle exiting the display. If it’s too loose or
too tight, it could get pinched during display reassembly.

mc425.jpg

Inverter Board

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc426.jpg

Procedure

Caution:  During this procedure, do not press on the fat area of the board or on its components.
Handle the board by the edges only.

1.Using a black stick or your fngers, disconnect the inverter cable from the left end of the
board.

mc427.jpg

2.Disconnect the LCD panel cable from the right end of the board.

mc428.jpg

3.Holding the board by the ends, lift out the inverter board from the slot in the display rear
housing. 

mc429.jpg

4.Install the replacement inverter board, and reassemble and test the computer.

mc430.jpg

Inverter Cable

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc432.jpg

Procedure

1.With the display assembly resting on a clean, soft cloth, note the position of the inverter
cable in relation to the left clutch barrel.

2.Remove the tape from the left clutch barrel.

mc433.jpg

3.Remove the 3-mm long ground screw, and disconnect the inverter cable from the left end of
the inverter board.

mc434.jpg

4.Remove the inverter cable from the display assembly.

mc435.jpg

5.Replace the inverter cable, and reassemble and test the computer
Replacement Note: Apply the tape where shown to secure the inverter cable to the left
hinge.

mc436.jpg

Display Hinges, Left and Right

Tools

Preliminary Steps

Before you begin, remove

 Part Location

mc437.jpg

Procedure

1.With the display housing on a soft cloth, remove the three identical 4-mm long screws along
the lower “arm” of each hinge.

mc438.jpg

2.Use a black stick to carefully pry up each hinge from the double-sided tape holding it to the
display rear housing.

mc439.jpg

Replacement Note: When installing new hinges, peel of the adhesive backing and align the
hinges over the screw standofs in the display rear housing.

3.Install the replacement display hinges, and reassemble and test the computer.

mc440.jpg

Bezel Brace, Right

The L-shaped bezel brace attaches to the right side of the LCD panel and includes integral tabs
for the microphone cable routing.

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc441.jpg

Procedure

Caution: Do not press on the LCD panel during this procedure.

1.Note how the microphone cable is routed through the tabs on the right bezel brace.

mc442.jpg

2.Without straining the microphone cable, use a black stick to loosen it from the tabs.

3.Remove the three identical 3-mm long screws (these can be identifed by the small screw
head) from the right side of the LCD panel.    

mc443.jpg

4.Remove the 3-mm long camera bracket screw. 

mc444.jpg

5.Without straining the USB fex cable, tilt up the camera bracket and remove the right bezel
brace from the LCD panel assembly.

mc445.jpg

6.Install the replacement right bezel brace, and reassemble and test the computer.

mc446.jpg

Sleep Magnet

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc447.jpg

Procedure

1.With the display rear housing on a soft cloth, note the position of the sleep magnet recessed
in the left side of the housing.
2.Using a black stick or a jeweler’s fatblade screwdriver, insert the tip of the black stick or
screwdriver in the tiny opening under the magnet, and pry up the sleep magnet from the
left side of the display rear housing.

mc448.jpg

Replacement Note: Notice the beveled shape of the magnet. Position the magnet in the
display rear housing so that the wider base of the magnet sits in the opening. Make sure the
magnet is securely in place before reassembling the display module.

3.Install the replacement sleep magnet, and reassemble and test the computer.

mc449.jpg

Display Magnet Pairs

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc450.jpg

Procedure

1.With the display rear housing on a soft cloth, note the position of the magnet pairs recessed
in the top corners of the display rear housing.
2.If the magnet pairs are tight in the slots, use a black stick or a jeweler’s fatblade screwdriver
to remove the magnet pairs from the display rear housing.

mc451.jpg

3.Install the replacement display magnet pairs, and reassemble and test the computer.

Replacement Note: Make sure a metal shunt is attached and correctly aligned to the base of
each magnet pair. The magnet pairs are interchangeable between the left and right side of
the display rear housing.

mc452.jpg

Slide the replacement magnet pairs into the top recessed areas of the display rear housing.
Replacement Note: In addition to the magnet pairs, check that the sleep magnet is also
installed in the rear housing, left side.

mc453.jpg

Replacement Note: When installing the LCD panel assembly, the magnets may be drawn to
the metal frame and become loose. Make sure they are ftted back in the rear housing before
tightening any screws on the LCD panel assembly.

mc454.jpg

Display Rear Housing

Tools

Preliminary Steps

Before you begin, remove

Part Location

mc455.jpg

Procedure

1.When all of the parts listed in the preliminary steps are removed, the remaining part is the
display rear housing.
mc456.jpg

Replacement Note: When reassembling the LCD panel assembly in the display rear housing,
make sure the magnet pairs and sleep magnet are secured in place.
Reassemble and test the computer.

2.Replacement Note: The display rear housing comes with the pre-installed Apple logo,
sponge pads, and corner brackets in the upper left and right corners.

Replacing Darfon Keycaps

Tools

Preliminary Steps

Before you begin, remove the battery.

Part Location


mc457.jpg

Procedure

The keycaps are secured to the top case keyboard with a scissor mechanism. This mechanism
operates the same for all keys although its design difers depending on the shape of the key.
For instance, square keys (i.e., letters A–Z, numbers, punctuation) employ an identical scissor
mechanism, whereas larger, rectangular keys (i.e., Shift, Delete, Return, Space bar) use slightly
diferent scissor mechanisms and employ one or two metal stabilizer bars.

Removing and Replacing a Square Key

1. If a key needs to be removed (for example, if a key is sticking when pressed), always pry it up
from the left side—either the upper or lower left corner.

mc458.jpg

2. Because adhesive is used under the top case, closely inspect the case for any adhesive that
may have built up under the keycap. Lift away any built-up adhesive using a black stick or fne-
point tweezers.

mc459.jpg

3. Test the operation of the scissor mechanism by using a black stick to carefully raise and lower
the mechanism.

mc460.jpg

• If it is installed correctly, the scissor should move smoothly.
• If it is loose, remove it and compare the two parts of the scissor mechanism to the image below.
- The inner piece should pivot smoothly within the outer piece.
- When closed, its profle should be fully fat.
- The slider bar and all four pins should be intact.

mc461.jpg

4. Check the underside of the keycap for two clips on one side and two hooks on the other side.
• If any of the hooks or clips are bent, broken, or missing, replace the keycap.
• If the hooks and clips are intact, re-use the keycap.

mc462.jpg

5. Check the rubber dome and raised metal areas inside the keycap opening on the top case.
• When the rubber dome is pressed and released, it should spring back upright. If the rubber
dome is of center or damaged, replace the top case.
• If the metal hook that holds the slider bar of the scissor mechanism is bent, try to bend it back
to a uniform 90-degree angle. If it is bent or broken beyond repair, replace the top case.
• If the two metal ears are bent, use needlenose pliers to straighten them. If either or both are
broken beyond repair, replace the top case.

mc463.jpg

6. With the scissor mechanism open, install the slider bar under the metal hook of the top case.

mc464.jpg

mc465.jpg

7. Allow the scissor mechanism to fold fat and hold the slider bar in place while using a black
stick to insert the scissor pins—one at a time—into the top case ears.

mc466.jpg

8. With the scissor pins inserted, use a black stick to raise and lower the scissor mechanism to
make sure it moves freely.

mc467.jpg

9. Moving from left to right, slide the right end of the keycap into the keycap well so that the
hooks inside the right side of the keycap latch onto the pins on the right side of the scissor
mechanism.

mc468.jpg

10. Press down on the left side of the key until the keycap snaps into place.

mc469.jpg

11. Check the key from all angles to make sure it is uniformly fat. Press and release the key
repeatedly to verify that it springs back each time.

Reassembling the Scissor Mechanism

If the two pieces of a scissor mechanism come apart,
• Check that the pieces are not damaged. The image below shows the separate scissor pieces and
the fully assembled scissor mechanism.
• Flex the outer piece to install the pins of the inner piece in the slots. The intact scissor
mechanism should swivel smoothly and fold fat.

mc470.jpg

Removing and Replacing the Space Bar

1. If a rectangular-shaped key needs to be removed (for example, if a key is sticking when
pressed), always pry it up from the left side—either the upper or lower left corner.

mc471.jpg

2. Because adhesive is used under the top case, closely inspect the case for any adhesive that
may have built up under the keycap. Lift away any built-up adhesive using fne-point tweezers.

mc472.jpg

3. Test the operation of the scissor mechanism by using a black stick to carefully raise and lower
the mechanism.

mc473.jpg

• If it is installed correctly, the scissor should move smoothly.
• If it is loose, remove it and compare the two parts of the scissor mechanism to the image below.
- The inner piece should pivot smoothly within the outer piece.

- When closed, its profle should be fully fat.
- The slider bar and all four pins should be intact.

mc474.jpg

4. Inspect the rows of clips on the underside of the keycap.
• If any of the clips are bent, broken, or missing, replace the keycap.
• If the clips are intact, re-use the keycap.

mc475.jpg

5. Check the rubber dome and raised metal areas inside the keycap opening on the top case.
• When the rubber dome is pressed and released, it should spring back upright. If the rubber
dome is of center or damaged, replace the top case.
• If the metal hook that holds the slider bar of the scissor mechanism is bent, try to bend it back
to a uniform 90-degree angle. If it is bent or broken beyond repair, replace the top case.
• If the two metal ears are bent, use needlenose pliers to straighten them. If either or both are
broken beyond repair, replace the top case.
• If a metal stabilizer bar is bent, try to straighten it.

mc476.jpg

6. With the scissor mechanism open, install the slider bar under the metal hook of the top case.

mc477.jpg

7. Allow the scissor mechanism to fold fat and hold the slider bar in place while using a black
stick to insert the scissor pins—one at a time—into the top case ears.

mc478.jpg

8. With the scissor pins inserted, use a black stick to raise and lower the scissor mechanism to
make sure it moves freely.

mc479.jpg

9. Check the keycap well area on the top case. If the bottom stabilizer bar is pushed up, move it
down as far as it will go.

mc480.jpg

10. Determine which is the top of the Space bar keycap by checking the clips on the inner plane.
The top of the keycap has the row of clips that extend closest to the sides of the keycap. These
top clips most closely match the longest stabilizer bar at the top of the keycap well.

mc481.jpg

11. Align the bottom row of clips inside the bottom edge of the keycap with the bottom stabilizer
bar.

12. Press and slide your fnger along the bottom of the Space bar over the bottom stabilizer bar
until you hear the clips click into place. (The keycap is tilted up at this stage.)

mc482.jpg

13. Press along the top of the Space bar to secure it to the top stabilizer bar. (Listen for the keycap
clicking into place.)

mc483.jpg

14. Press the length of the Space bar to ensure all clips are secure.

mc484.jpg

15. Check the key from all angles to make sure it is uniformly fat. Press and release one corner of
the key. If the key is installed correctly, the opposite corner should respond at the same level (not
tilted higher or lower).

mc485.jpg

Replacing Mitsumi Keycaps

Tools

Preliminary Steps

Before you begin, remove the battery.

Part Location

The Mitsumi keyboard comes in three versions: ANSI, ISO, and JIS. Refer to the following keyboard

layouts to help identify them.

ANSI Keyboard Layout:

mc486.jpg

ISO Keyboard Layout:

mc487.jpg

JIS Keyboard Layout:

mc488.jpg

Procedure

Like the Darfon keyboard, the Mitsumi keyboard is integrated in the top case and cannot be
removed from the top case. The Mitsumi keyboard comes in three versions: ANSI, ISO, and JIS. The
square keycaps for all three versions use the same dual-hinge mechanism inside the keycap well
with one stabilizer bar inside the keycap.
For the Space bar replacement, the ANSI and ISO Space bar keycaps look the same: two single-
hinge mechanisms and two stabilizer bars in the keycap well. The JIS Space bar keycap, by
contrast, has two dual-hinge mechanisms and two stabilizer bars.
Once you are experienced replacing square keycaps and the Space bar, you can easily replace
other size keys because of their shared traits. For example, the ANSI Return keycap has a dual-

hinge mechanism and one stabilizer bar; whereas the ISO and JIS Return keycap has no hinge
mechanism and three stabilizer bars.
Important Tips:
Before installing a new keycap, make sure

keycap over the keyboard well.
Removing and Replacing a Square Key

1. If a key needs to be removed (for example, if a key is sticking when pressed), pry it up from the
top.

mc489.jpg

2. Because adhesive is used under the top case, closely inspect the case for any adhesive that
may have built up under the keycap. Lift away any built-up adhesive using fne-point tweezers.

3. Note the stabilizer bar and clips on the underside of the keycap, and check that the dual-hinge
mechanism lays fat.

mc490.jpg

4. Test the operation of the dual-hinge mechanism by using a black stick to carefully raise and
lower the mechanism.

mc491.jpg

5. Check that the stabilizer bar can pivot easily within the hooked ends of the keycap.

6. Check the rubber dome inside the keycap opening on the top case.

mc492.jpg

7. With the stabilizer bar open, press the two ends of the slider bar into the slots in the keycap
well so they snap into place.

mc493.jpg

8. Allow the dual-hinge mechanism to fold fat, and use a black stick to make sure the hinged
pieces are pushed farthest away from the rubber dome (this is a tiny movement).

mc494.jpg

9. Carefully lower the keycap onto the top case, and press down on the center of the key until the
keycap snaps into place.

mc495.jpg

10. Check the key from all angles to make sure it is uniformly fat. Press and release the key
repeatedly to verify that it springs back each time.

Reassembling the Hinge Mechanism
This procedure shows images from a JIS keyboard; however, the steps for replacing the hinge
mechanism are the same for any versions of the Mitsumi keycaps.
1.If a hinge piece becomes loose from the top case, check that the hinge piece is not damaged. 

mc496.jpg

2. Check both sides of the hinge piece. Note that the top plane of the hinge piece has two barely
visible recessed circles, and the end pins ft into the hooked slots on the anchored plane inside
the keycap well. 

mc497.jpg

3. With the hinge piece held vertically, position it into the hooked area (1), and slide it forward (2)
so it becomes anchored in place and can fold down fully fat.

mc498.jpg

Replacement Note: If the hinge piece is upside-down, it will not lay fully fat.

Removing and Replacing an ANSI or ISO Space Bar
1. If a Space bar needs to be removed (for example, if it is sticking when pressed), pry it up from
the top edge frst.

mc499.jpg

2. With the top edge loosened, pry up the Space bar from the lower edge. Use a black stick, if
necessary, to tilt up the key.

mc500.jpg

3. Because adhesive is used under the top case, closely inspect the case for any adhesive that may
have built up under the keycap. Lift away any built-up adhesive using fne-point tweezers.
4. Check that the longest stabilizer bar can pivot easily within the four hooks of the keycap.

5. Check the rubber dome inside the keycap well on the top case.

mc501.jpg

6. With the stabilizer bar open, make sure the two ends of the slider bar are secured into the slots
in the keycap well.

7. Make sure the single-hinge mechanism on both ends of the keyboard well is fully fat and
pressed as far as it will go away from the rubber dome. Then lower the keycap so that the three
clips align with the smaller stabilizer bar.

mc502.jpg

8. Lower the key down.

mc503.jpg

9. Press the major contact points, and then press over the entire key to hear it snap into place.

mc504.jpg

10. Check the Space bar key from all angles to make sure it is uniformly fat. Press and release one
corner of the key. If it is installed correctly, the opposite corner should move at the same level.

Removing and Replacing a JIS Space Bar

1. If a Space bar needs to be removed (for example, if it is sticking when pressed), pry it up from
the top edge frst.

mc505.jpg

2. With the top edge loosened, pry up the Space bar from the lower edge. Use a black stick, if
necessary, to tilt up the key.

mc506.jpg

3. Because adhesive is used under the top case, closely inspect the case for any adhesive that may
have built up under the keycap. Lift away any built-up adhesive using fne-point tweezers.
4. Check that the longest stabilizer bar can pivot easily within the three hooks of the keycap.

5. Check the rubber dome inside the keycap well on the top case.

mc507.jpg

6. With the stabilizer bar open, make sure the two ends of the slider bar are secured into the slots
in the keycap well.

mc508.jpg

7. Make sure the dual-hinge mechanism on both ends of the keyboard well is fully fat and
pressed as far apart they will go. Then lower the keycap so that the clips align with the smaller
stabilizer bar and the center of the hinge mechanism.

mc509.jpg

8. Lower the key down.

mc510.jpg

10. Check the Space bar key from all angles to make sure it is uniformly fat. Press and release one
corner of the key. If it is installed correctly, the opposite corner should move at the same level.

General Information

The kinds of problems you might see when troubleshooting this computer include:

In the next section we will discuss the individual troubleshooting steps as they apply to this
product. As a reminder, the troubleshooting steps are:

Note: If you are not familiar with the Apple General Troubleshooting Flowchart, see the self-
paced course General Troubleshooting Theory.

Troubleshooting Steps

You perform the frst few steps of troubleshooting regardless of whether there is a repairable
problem or damage.

Gather Information

Gather the normal information about the problem. (If you are not familiar with the normal
information to gather, or any of the other steps, see General Troubleshooting Theory.)

Verify the Problem

Verify that the symptom exists as the customer reports it.

Try Quick Fixes

Special quick fxes that apply to this computer include:

30612)

 For more details, see the Symptom Charts section.

Run Diagnostics

The following diagnostic tools are available for this product:

See Knowledge Base document 112125, “Service Diagnostic Matrix”, to download the appropriate
disc image.

Try Systematic Fault Isolation

There are no special systematic fault isolation techniques for this product.

Research

If you have not located the trouble following the steps thus far, try researching the symptoms.
Research resources include:

gsx.apple.com
Enter serial number and click Coverage Check
Service Source

Check Quick Links and/or Technical Resources
Check options under appropriate Product Service pop-up menu

service.info.apple.com
Choose MacBook Support Page from the appropriate Product Service pop-up menu

search.info.apple.com
keyword kmb

service.info.apple.com
Choose Service Training from the Product Service pop-up menu

Escalate

Follow the practices and policies of your business or agency.

Repair or Replace

Once you locate the trouble you will most likely need to repair the unit, or mail it in to an
AppleCare Repair Center, depending on the service strategy in your region. Be sure to include
the CompTIA code, the troubleshooting steps you performed, and the results in the Service
Instructions section of GCRM and/or GSX.
If the symptoms point to a component on the logic board, use the block diagram at the end of
this chapter to help determine whether you need to replace the entire logic board.
Also be aware of the following parts that customers may replace themselves (known as Do-It-
Yourself parts):

Note: For the current list of Do-It-Yourself parts, see the product support website.

Verify the Repair

To verify the repair:
1.Try to recreate the original symptoms. You should not be able to. (If you can, return to the
beginning of the troubleshooting fowchart.)
2.Perform the preventive maintenance tasks for this product.
For this computer this includes only cleaning the display and case.

Inform the User

Include in the case notes all that you have done. The customer may like a copy of any diagnostic
reports.

Important: For any unit you send on to a repair center, include the CompTIA code, symptoms,
steps to reproduce, and troubleshooting steps you have completed thus far in the Service
Instructions section of GCRM and/or GSX. (Service Instructions are also known as FAI notes.)

Complete Administrative Tasks

There are no particular administrative tasks for this product, other than those required by the
internal policies of your business or agency.

Symptom Charts

When to Use the Symptom Charts

Before turning to the symptom charts, you should have completed the following steps on the
Apple General Troubleshooting Flowchart:

  1. Gather information
  2. Verify the problem
  3. Try quick fxes

You consult the symptom charts as part of the Research troubleshooting step (and sometimes as
part of the Try Quick Fixes step).

How to Use the Symptom Charts

The Symptom Charts included in this chapter will help you diagnose specifc symptoms related
to the product. Cures are listed on the charts in the order of most likely solution: try the cures in
the order presented. Verify whether or not the product continues to exhibit the symptom. If the
symptom persists, try the next cure.

Note: If a step instructs you to replace a module, reinstall the original module before you
proceed to the next step.

AirPort Extreme Card not recognized

Check Network pane in System Preferences to verify AirPort port is selected.

Poor AirPort reception

Refer to Knowledge Base article 88258 “PowerBook G4: How to Optimize AirPort reception”.

1.Reseat AirPort Extreme and Bluetooth antenna cables on cards.
2.Check AirPort Extreme and Bluetooth antenna cables for damage.
3.Replace with known-good AirPort Extreme Card or Bluetooth card.
4.Replace AirPort Extreme or Bluetooth antenna cables.

Unit unusually hot

This computer runs hotter than previous models. However, the normal operating temperature
is well within national and international safety standards. Nevertheless, customers may be
concerned about the generated heat. To prevent an unneeded repair, you can compare a
customer’s computer to a running model, if available, at your repair site.
1.Verify that the customer uses the computer while it is placed on a fat, hard surface.

2.Verify that the computer is hotter than expected for normal operation. If possible, compare
how hot the computer case feels with how hot the case of a running display model feels.

3.Is the computer running hotter than normal?
Yes: Proceed to the next step.
No: The unit is operating normally. Proceed to the Inform Customer step on the fowchart.
When speaking with the customer, direct him or her to Knowledge Base article 30612.

4.Check the processor speed.

5.Is the processor speed running at the setting the customer set?
Yes: Continue with the next step.
No: The computer could be overheating. The operating system will automatically reduce the
processor speed if the computer starts to get too hot. Continue with the next step.
6.Check for a failed fan.

7.Can you hear the fan running?
Yes: Continue with the next step.
No: This computer has only one fan. If the unit feels too hot and you do not hear a fan
running or cannot feel the air venting over the top of the keyboard, the fan may have failed.
Proceed to the Take Apart procedure for replacing the fan.

8.Check for misplaced thermal grease.
Each processor chip should have .01 to .12 cc (one-third of a single syringe) of grease on it.
It should look completely covered. See the Heatsink section of the Take Apart chapter for
complete details.

9.Is the thermal grease applied in the right places and in the right amount, according to the
service manual?
Yes: You have eliminated all the immediately known potential causes of an unusually hot
unit. Proceed to the Systematic Fault Isolation step of the troubleshooting fowchart.
No: Apply the thermal grease correctly, according to the instructions in the service manual
then proceed to the Verify Repair step of the troubleshooting fowchart.

For more information on the operating temperature of Apple portable computers, see
Knowledge Base article 30612, “Apple Notebooks: Operating Temperature”. You may also want to
point out this article to the customer.

Fan fails

1.Check fan cable connection, and check cable for damage.
2.Check fan for loose parts stuck in fan blades.
3.Replace fan.
4.Replace logic board.

Disc will not eject

The optical drive on this computer has narrow tolerances for the recommended optical media.
If the drive does not accept discs, the wrong kind of disc could be inserted. Advise customer to
use discs no thicker than 1.5 mm. See Knowledge Base article 88275, “MacBook Pro, MacBook,
PowerBook G4, iBook G4: Troubleshooting the slot load disc drive”.

1.Verify disc is not in use by quitting any applications that may be using the disc.

2.Press and hold Media Eject key at top right corner of keyboard. If that does not work, hold
down Function (fn) key and Media Eject key.

3.Drag disc icon to trash or select it and press Command-E.

4.Choose Restart from Apple menu while holding down trackpad button.

5.Replace the optical drive.
Related Knowledge Base article: 106752: Macintosh: How to Eject a Disc When Other Options
Do Not Work

Memory not recognized; beeping tones

You may need to use increased frm pressure when installing memory. If you or the customer do
not fully seat the memory the computer will not start up, or System Profler may not recognize
the memory. See Knowledge Base article 303721 “MacBook (13-inch): How to install memory”.

Computer will not start; LED blinks or remains on

1.You may need to use increased frm pressure when reseating memory. Try ejecting the
memory and reseating it.

2.Try known-good memory.
If you or the customer do not fully seat the memory, the computer will not start up. See
Knowledge Base articles 303083, “Intel-based Mac Power On Self Test RAM error codes”, and
303721, “MacBook (13-inch): How to install memory”.

Battery won’t charge

1.Remove any connected peripherals.

2.Try known-good power outlet.

3.Try known-good power adapter and power cord.
Note: Verify that power adapter connector glows amber or green. If the power adapter light
is green, turn over the computer and press the battery button. The battery lights should
glow green and stay on if the power adapter is operating correctly.

4.Try known-good battery.

5.Reset the power manager by pressing the key combination Control-Option-Shift-power. 
Warning: Make sure you do not hold down the “fn” key when resetting the power manager.
Warning: Resetting the power manager means you will also need to reset the date and time
(using the Date & Time control panel).

6.Try known-good DC-in board and cable assembly.

7.Replace battery connector with sleep switch.

8.Replace logic board.

Optical drive does not work

There are four clips at the optical drive bezel that can come loose during disassembly or
reassembly. If any come loose, they could cause the optical drive to fail to function.
If, after trying other less invasive quick fxes, the optical drive still does not function, remove the
top case and check that the four clips at the optical drive bezel (shown below) are in place. See
Top Case in the Take Apart chapter.

mc512.jpg

Optical drive does not accept CD or DVD disc (mechanical failure)

1.Verify disc is not warped.
2.Verify drive slot has no foreign object in channel.
3.Verify disc is properly seated in the carrier.
4.Replace optical drive.
See Knowledge Base article 88288 “Apple Portables: Tips for inserting discs into the disc
drive.”

Disc icon does not show up on desktop, or a dialog box appears to initialize disc

  1. Verify the correct type of disc is being used.
  2. Try cleaning the disc. It may not mount if dirty or scratched.
  3. Verify media is positioned correctly: data side down.
  4. Try a diferent disc.
  5. Listen to verify that the disc spins.
  6. Reseat optical drive cable.
  7. Verify the logic board connection by trying a known-good optical drive and disc.
  8. Replace optical drive cable.
  9. Replace optical drive.

Combo drive does not write at maximum speed

Refer to Knowledge Base article 86186: “PowerBook G4, iBook: Combo Drive Does Not Write CD-R
Media at Maximum Speed”.

Keycap damaged or sticking

If a keycap is damaged, you may be able to replace just a keycap rather than the entire top case.
Refer to the Additional Procedures chapter to identify the keyboard on the top case and verify
whether or not to replace a keycap.

Power issues, power adapter dead, no power

1.Check for damaged pins or magnetic debris on MagSafe power adapter. If pins are okay,
reseat power adapter connector and make sure it is fully inserted. Refer to Knowledge Base
articles 303566 “MacBook Pro: Troubleshooting MagSafe power adapters with stuck pins” and
302461 “Troubleshooting iBook, PowerBook G4, and MacBook Pro power adapters”.

2.Remove any connected peripherals.

3.Try known-good power outlet.

4.Remove battery, and remove AC power.

5.Press Caps Lock key to see if light on key comes on. If it does, hold power button down for
six seconds to shut down the computer and restart.

6.Reset PRAM (Press the power button, then hold down the Option-Command-P-R keys until
you hear the startup chime at least one additional time after the initial startup chime).

7.Reset the power manager. See Knowledge Base article 303319, “Resetting MacBook Pro
Power Management Unit (PMU)”. 
Warning: Make sure you do not hold down the “fn” key when resetting the power manager. 
Resetting the power manager means you will also need to reset the date and time (using the
Date & Time pane of System Preferences).

8.Test each RAM slot individually with known-good RAM. (The computer should still start with
only one known-good DIMM.)

9.Remove AirPort Extreme Card.

10.If computer starts on battery power only, try replacing MagSafe board with a known-good
MagSafe DC-in board.

11.Verify cable connections and check cables for damage.

12.Verify power button is connected properly to logic board, if power button is not functioning
correctly or damaged, replace the top case.

13.Replace logic board.

Computer shuts down intermittently

Apple has released SMC version 1.1 for the MacBook, which improves the computer’s
internal monitoring system and addresses issues with unexpected shutdowns. This update is
recommended for all MacBook systems, including those that received warranty repair. Efective
immediately, when repairing MacBook computers with an intermittent shutdown failure, follow
the procedure outlined below.
1.Make sure the operating system has been updated to Mac OS X 10.4.8 or later and that SMC
version 1.1 (or later) has been installed. If so, go to the next step.

2.Remove all third-party internal and external devices from the computer and test again. If the
issue still occurs, go to the next step.

3.Reseat the computer’s system memory and test again. If the issue still occurs, go to the next
step.

4.Make sure you are testing from a known-good power adapter and a known-good battery
that is fully charged.

5.If the intermittent shutdown symptom persists after completing the steps above AND the

black or white MacBook is within the serial number range xx617xxxxxx - xx635xxxxxx, Apple
will replace the heatsink under warranty.
Important: Do not disclose serial number ranges to customers. Order the following part for
all MacBook computers exhibiting this behavior: 
076-1243 Heatsink Kit, with Sponge, 1.0 mm Conn
Note: The kit includes the heatsink, heatpipe sponge, and connector pressure-foam pad.
More details about the MacBook intermittent shutdown issue is available in Knowledge Base
article 304308 “MacBook: Shuts down intermittently”.

Trackpad works intermittently

The trackpad operation can be afected by hand lotion, humidity, dangling jewelry, and the use of
more than one fnger on the trackpad.
1.Check for environmental factors such as humidity, hand lotion, or jewelry.
2.Clean the trackpad with a clean, dry lint-free cloth.
For more information, see Knowledge Base articles: 17228: “Portables: Jumpy or Erratic Trackpad
Operation”; 58389: “PowerBook and iBook: Trackpad Does Not Respond”.

USB port is not recognizing known devices

1.Completely shut down, then press the power button to start the computer.
2.Use Software Update in Mac OS X system preferences to verify that the latest software is
installed.
3.Use Apple System Profler to verify that the computer is recognizing the bus.
4.Test USB port with an Apple keyboard or mouse.
5.Verify USB port provides power to USB device.
6.Verify that drivers are installed properly for third party, if needed.
7.Try other port if available.
8.Try a diferent cable.
9.Try known-good device.
10.Check that device’s LED indicates that it is getting power.
11.Replace logic board.

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