Apple Power Mac G4 Service Manual
Service Source
Power Mac G4 (Mirrored Drive Doors)
© 2002 Apple Computer, Inc. All rights reserved.
Service Source
Take Apart
Power Mac G4 (Mirrored Drive Doors)
© 2002 Apple Computer, Inc. All rights reserved.
General Information
Overview
The identifying characteristics on the front of this Power Mac G4 (Mirrored Drive Doors)
computer are its top speaker and mirrored optical drive bezel. Like the Power Mac G4
(QuickSilver and QuickSilver 2002) computers, this model also has a silver-colored case.
Tools
The following tools are required:
• #2 Phillips screwdriver
• #1 Phillips screwdriver
• T-10 Torx driver or 2.5 mm Allen wrench
• Small flat-blade screwdriver
• Needlenose pliers
Note:
General Information
Magnetized tools are recommended to avoid dropping screws within the computer.
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Note:
To organize the screws your remove from the computer, use a tray with divided
compartments (such as a plastic ice cube tray).
Serial Number Location
The computer’s serial number is located on the back panel.
Before Opening the Computer
Warning:
be opened for any reason, even when the computer is off.
Warning:
it to allow internal components to cool.
Important:
disconnect their power plugs from the power source. Make sure the power cords to the
computer and display are within easy reach.
The pow er supply in this computer is a high-voltage component and should not
After shutting down the computer, you must wait a few min utes before servicing
The only way to shut off power completely to the computer and display is to
Electrostatic Discharge (ESD) Precautions
Follow these steps to avoid damage from ESD before working inside the computer.
1. Shut down the computer.
2. Wait a few minutes to allow the computer’s internal components to cool.
3. Unplug all cables from the computer except the power cord.
4. Touch the metal PCI access covers on the back of the computer to discharge static
electricity.
5. Unplug the power cord.
6. Lift the latch on the side of the computer. (If the latch will not lift, check that the
security lock port and lockable cover latch in the back of the computer are not locked.)
7. Put on an ESD wrist strap.
8. To avoid static electricity building back up in your body, do not walk around the room
until after you have finished working and closed the computer.
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General Information
Opening the Computer
Tools
No tools are required for this procedure.
Preliminary Steps
No preliminary steps are required before you begin this procedure.
Procedure
1. Lift the latch to unlock the right side access panel.
2.
Note:
Opening the Computer
Note:
Gently lower the side panel onto a clean, ESD-safe mat to avoid scratching the
case. Lower the side panel until it lies flat.
Release the latch before returning the side panel to its upright closed position.
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Top Handles
Tools
The only tool required for this procedure is a 2.5 mm Allen wrench.
Part Location
Preliminary Steps
There are no preliminary steps for this procedure.
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Power Mac G4 (Mirrored) Take Apart
Top Handles
Procedure
1. Remove the two Allen screws that secure the handle you are replacing.
2. Lift the handle from the computer.
Top Handles
Replacement Note:
raised points on the computer.
When replacing a handle, make sure the inner prongs fit inside the
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Replacement Note:
three tiny bumps are near the lower edge of the handle .The handle w on’t fit properly if it is
turned upside down. The top front and top rear handles are interchangeable.
When replacing a handle, make sure you orient the handle so the
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Power Mac G4 (Mirrored) Take Apart
Top Handles
Top Panel
Tools
No tools are required for this procedure.
Part Location
Top Panel
Preliminary Steps
Before you begin, remove the handles from the top front and top rear of the
computer.
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Procedure
1. Slide the top panel toward the front of the computer to unhook the six tabs.
2. Lift the top panel from the chassis.
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Power Mac G4 (Mirrored) Take Apart
Top Panel
Speaker Grill
Tools
The only tool required for this procedure is a small flat-blade screwdriver.
Part Location
Speaker Grill
Preliminary Steps
There are no preliminary steps for this procedure.
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Procedure
1. Insert the tip of a screwdriver into one of the openings in the speaker grill.
Warning:
2. Pry out the speaker grill.
To prevent damage to the speaker, do not insert the screwdriver too far.
Replacement Note:
Press the replacement speaker grill into the speaker opening.
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Power Mac G4 (Mirrored) Take Apart
Speaker Grill
Lower Supports
Tools
The only tool required for this procedure is a 2.5 mm Allen wrench.
Part Location
Lower Supports
Preliminary Steps
Before you begin, place the computer upside down on an ESD mat.
Warning:
computer can be unstable.
When the computer is upside down or the lower supports are removed, the
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Procedure
1. With the computer upside down, remove the two Allen screws securing the support to
the computer.
2. Remove the support from the computer.
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Power Mac G4 (Mirrored) Take Apart
Lower Supports
Lower Panel, Front
Tools
No tools are required for this procedure.
Part Location
Lower Panel, Front
Preliminary Steps
Before you begin, remove the lower front support.
Warning:
computer can be unstable.
When the computer is upside down or the lower support is removed, the
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Procedure
1. Lift the lower front panel from the chassis. There are no screws holding this panel to
the chassis; the front support holds it in place.
2.
Important: Note the routing of the AirPort antenna cable. Carefully remove it
from the notches in the lower front panel.
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Lower Panel, Front
Lower Panel, Rear
Tools
No tools are required for this procedure.
Part Location
Lower Panel, Rear
Preliminary Steps
Before you begin, remove the lower rear support.
Warning:
computer can be unstable.
When the computer is upside down or the lower support is removed, the
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Procedure
Lift the lower rear panel from the chassis. There are no screws holding this panel to the
chassis; the rear support holds it in place.
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Power Mac G4 (Mirrored) Take Apart
Lower Panel, Rear
Rear Vented Panel
Tools
The following tools are required for this procedure:
• 2.5 mm Allen wrench
• Flat-blade screwdriver
Part Location
Rear Vented Panel
Preliminary Steps
Before you begin, remove the following:
• Lower rear support
• Lower rear panel
• Top rear handle
Warning:
computer can be unstable.
When the computer is upside down or the lower supports are removed, the
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Procedure
1. With the computer positioned on its left side panel, remove the three Allen screws
securing the rear vented panel to the computer.
2. Use a flat-blade screwdriver to pry out the tabs from the lower chassis.
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Power Mac G4 (Mirrored) Take Apart
Rear Vented Panel
3. Grasp the rear vented panel on both sides of the lockable cover latch, and forcefully
pull off the rear vented panel.
Rear Vented Panel
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Hard Drive Carrier, Back
Tools
The following tools are required for this procedure:
• Magnetized #2 Phillips screwdriver.
• Pliers
Part Location
Preliminary Steps
Before you begin, open the side access panel.
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Hard Drive Carrier, Back
Procedure
1. Using a Phillips screwdriver, remove the screw that attaches the carrier to the chassis.
2. Pull the left side lever forward, and slide the carrier up to release the mounting pegs
on the back of the carrier from the chassis.
Hard Drive Carrier, Back
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3. Rotate the carrier back from the chassis far enough to reach the drive cables.
Disconnect the hard drive data and power cables (P2 and P3) from the hard drive(s).
Note:
You might need to use pliers to grasp and disconnect the power cable
connector(s).
4. Remove the carrier and drive(s) from the computer.
Replacement Note:
Connect the cables to the drives before installing the carrier.
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Hard Drive Carrier, Back
Replacement Note:
notches in the chassis. Then press the carrier in and down until the pegs engage and the
left side lever clicks into place.
Be sure to align the mounting pegs on the back of the carrier with the
Hard Drive Carrier, Back
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Hard Drive Carrier, Front
Tools
The only tool required for this procedure is a magnetized Phillips screwdriver.
Part Location
Preliminary Steps
Before you begin, open the side access panel.
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Power Mac G4 (Mirrored) Take Apart
Hard Drive Carrier, Front
Procedure
1. Using a Phillips screwdriver, remove the carrier mounting screw.
2. Press down on the right side lever, and slide the carrier forward and out of the
computer.
Warning: Be careful not to scrape any cables when sliding the carrier forward.
Hard Drive Carrier, Front
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Replacement Note: Align the center mounting peg on the top of the carrier with the
center channel on the underside of the optical drive shelf. This center peg helps to guide
the carrier. Then align the two remaining pegs, and slide the carrier in until the pegs
engage and the right side lever clicks into place.
Replacement Note: Before closing the side access panel, make sure the P4 and P5
power cable connectors are either attached to the hard drives or tucked inside the front
hard drive carrier.
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Hard Drive Carrier, Front
Hard Drive
Tools
The only tool required for this procedure is a Phillips screwdriver.
Preliminary Steps
Before you begin, do the following:
• Open the side access panel.
• Remove the hard drive carrier.
Procedure
1. Remove the four mounting screws from the sides of the drive carrier.
2. Slide the drive forward out the front of the drive carrier.
Power Mac G4 (Mirrored) Take Apart - 27
ATA 100 Hard Drive Cable
Tools
No tools are required for this procedure.
Preliminary Steps
Before you begin, do the following:
• Open the side access panel.
• Remove the back hard drive carrier.
Procedure
1. Open the cable clamp at the bottom of the chassis.
2. Disconnect the ATA 100 cable from the connector at J34 on the logic board.
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