Apple mac pro 8x User Manual

							Mac Pro (8x) Take Apart — Logic Board 91
Starting at the back panel side of the logic board and working clockwise around the board, 2. 
disconnect all cables from the logic board. 
Note: There are 14 cables you will be disconnecting from the logic board.   
						

							Mac Pro (8x) Take Apart — Logic Board 92
Using a magnetized #1 Phillips screwdriver, remove the 11 black logic board mounting 3. 
screws.  
						

							Mac Pro (8x) Take Apart — Logic Board 93
Slide the logic board back a short distance from the port openings in the back panel. Make 4. 
sure the ports clear the openings.
Tilt the top edge of the logic board up and maneuver the board out of the enclosure.5.  
						

							Mac Pro (8x) Take Apart — Logic Board 94
Replacement Note: Before replacing the logic board, check the underside of the board to be 
sure that all bumpers are in place. Replace any missing bumpers.
Replacement Note: If you are replacing the logic board with a new logic board, do the following:
Remove the protective caps from the new logic board’s processor holders and transfer the • 
caps on the original logic board’s processor holders. Note that logic boards returned to 
Apple without the protective caps may be rejected.
Warning: Be careful not to touch the gold pins in the processor socket on the logic board. 
						

							Mac Pro (8x) Take Apart — Logic Board 95
Transfer the processors to the new board: Refer to the “• Processors” topic in this chapter.
You must also transfer the back ports EMI shield to the new board.• 
Replacement Note: To replace the logic board, tilt it as shown and lower it into the enclosure.
Note: Unlike in earlier Power Mac G5 computers, replacing a logic board in Mac Pro (8x) does not 
require running Apple Service Diagnostic for thermal calibration.
Important: For proper performance, all logic boards in Intel-based desktop computers and 
servers must be upgraded to the latest version of the BootROM. You can download the latest 
version from the Apple support web site: 
http://www.apple.com/support/downloads/ 
						

							Mac Pro (8x) Take Apart — Front Panel Board 96
Front Panel Board
Tools
The only tool required for this procedure is a long-handled, magnetized Phillips #1 screwdriver.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Hard drives and hard drive carriers in drive bays 1 and • 2
Any 12-inch PCI Express card• s
Processor heatsink cove• r
Front fan assembl• y
Part Location 
						

							Mac Pro (8x) Take Apart — Front Panel Board 97
Procedure
Disconnect the optical drive ribbon cable from the logic board and move the cable out of 1. 
the way.  
						

							Mac Pro (8x) Take Apart — Front Panel Board 98
Disconnect the following five cables from the front panel board: 2. 
• FireWire 800 cable from connector J200 
• USB cable from connector J201 
• Front panel board power cable from connector J202 
• Front panel board audio cable from connector J600 
• Power button cable from connector J800  
						

							Mac Pro (8x) Take Apart — Front Panel Board 99
Using a magnetized #1 Phillips screwdriver, remove the five front panel board mounting 3. 
screws. 
Lift the front panel board out of the computer.4. 
Note: If you are replacing the front panel board with a new front panel board, separate the EMI 
shield from the back of the board and transfer it to the new front panel board. 
						

							Mac Pro (8x) Take Apart — Power Button 100
Power Button
Tools
The only tool required for this procedure is a jeweler’s flat-blade screwdriver.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Hard drives and hard drive carriers in drive bays 1 and • 2
Any 12-inch PCI Express card• s
Processor heatsink cove• r
Front fan assembl• y
Part Location