Apple power mac g5 late 2005 User Manual

							
Power Mac G5 (Late 2005) Take Apart — Power Button 111
Remove the metal activation ring that lies below the power button board. 
Remove the power button from the enclosure. 
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Power Mac G5 (Late 2005) Take Apart — Logic Board 112
Logic Board
Tools
The following tools are required for this procedure:
Phillips #1 screwdriver
long-handled T-10 torx driver
9/32-inch nut driver
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Front inlet fan assembly
Heatsink cover
Processor inlet frame (Dual 2.0/2.3 GHz) or Processor inlet frame (Quad)
Processor (Dual 2.0/2.3 GHz) or Processor (Quad)
Processor support bar
All graphics and PCI Express cards
AirPort Extreme/Bluetooth combo card and runway card
Rear exhaust fan assembly
PCI card guide
Speaker/fan assembly
Front panel board
PCI divider
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Power Mac G5 (Late 2005) Take Apart — Logic Board 113
Part Location 
						

							
Power Mac G5 (Late 2005) Take Apart — Logic Board 114
Procedure
Disconnect the cables from the top and bottom edge of the logic board. 
Using a long-handled T-10 torx driver, remove the nine power supply bus bar screws. 
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Power Mac G5 (Late 2005) Take Apart — Logic Board 115
Using a 9/32-inch nut driver, remove the six logic board standoffs. 
Using a Phillips #1 screwdriver, remove the three black logic board mounting screws. 
Move the cables and processor power terminal assemblies out of the way. Then carefully 
slide the logic board to the left to release it from the three mushroom-head standoffs. 
Tilt the logic board up and maneuver it out of the enclosure, making sure the ports clear the 
enclosure openings. 
 
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Power Mac G5 (Late 2005) Take Apart — Logic Board 11
Note: Perform the following procedures only if you are replacing the logic board with a new 
logic board.
Transfer the following from the original logic board to the replacement board: 
• Memory DIMMs 
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Ambient board 
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Quadro FX 4500 graphics card cable (if installed)
Transfer the port EMI shield from the original logic board to the replacement logic board, 
making sure the shield is fully seated on the ports. 
Replacement Procedure
Important: Before you install a replacement logic board, remove the protective clips and caps 
circled in the illustration below and transfer them to the logic board you are returning to Apple. 
Do not remove the mylar sheet from the board.
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Power Mac G5 (Late 2005) Take Apart — Logic Board 11
Temporarily tuck the top cables into the openings in the media shelf so that they are out of 
the way. Also tape or hold the bottom cables out of the way. 
Note: You may find a long strip of packing tape useful in securing the cables.
Angle the logic board into the enclosure so that the port edge goes in first. 
Warning: Be careful not to catch the battery on the edge of the case as you lower the logic 
board into the enclosure. Also make sure the connector ends of the antenna cables are not 
caught under the board.
Position the logic board on the three mushroom-head standoffs, aligning the ports with the 
openings in the enclosure. 
Slide the board toward the rear of the computer so that the logic board locks onto the 
mushroom-head standoffs and the ports are fully seated in the back panel openings. 
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Power Mac G5 (Late 2005) Take Apart — Logic Board 11
Replace the three logic board screws and six standoffs in the order indicated below. 
 
Important: There are two versions of the power supply, one with two processor power 
terminal assemblies and the other with just one processor power terminal assembly. In either 
case, make sure the rear standoffs are threaded through the power terminal rings before you 
insert the standoffs into the logic board. 
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Power Mac G5 (Late 2005) Take Apart — Logic Board 11
Replace the nine power supply bus bar screws.
Reconnect all cables at the top and bottom edge of the logic board.
Replace the PCI divider.
Replace the front panel board.
Replace the speaker/fan assembly and reconnect its cables to the logic board.
Replace the PCI card guide. 
Note: If the computer includes a Quadro FX 4500 graphics card, you must connect the 
Quadro FX 4500 cable to the logic board before you replace the PCI card guide.
Replace the rear exhaust fan assembly and reconnect its cable to the logic board.
Replace the runway and AirPort Extreme/Bluetooth combo cards.
Replace all graphics and PCI Express cards.
Replace the processor support bar and reconnect the processor support bar cable to the 
logic board.
Replace the processor.
Replace the processor inlet frame.
Replace the heatsink cover.
Replace the front inlet fan assembly.
Important: Whenever you replace a logic board with a new logic board, you must run Apple 
Service Diagnostic (once the computer is reassembled). Apple Service Diagnostic for Power Mac 
G5 is available as a download from the Disc Images section of the Apple Service Source website. 
For more information, see “Thermal Calibration” in the Troubleshooting chapter.
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Power Mac G5 (Late 2005) Take Apart — Antenna Board and Cables 120
Antenna Board and Cables
Note: The antenna cables are permanently attached to the antenna board. The cables and board 
are removed from the enclosure as a unit.
Tools
The only tools required for this procedure are a Phillips #1 screwdriver and a flatblade 
screwdriver.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Front inlet fan assembly
Heatsink cover
Processor inlet frame (Dual 2.0/2.3 GHz) or Processor inlet frame (Quad)
Processor (Dual 2.0/2.3 GHz) or Processor (Quad)
Processor support bar
All graphics and PCI Express cards
AirPort Extreme/Bluetooth combo card and runway card
Rear exhaust fan assembly
PCI card guide
Speaker/fan assembly
Front panel board
PCI divider
Logic board
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