1. To keep them out of the way, temporarily tape the antenna cables to the bottom of the media shelf.
Important: Be sure to disconnect all cables from the logic board before you remove the logic board mounting screws.
2. Starting at the back panel side of the logic board and working clockwise around the board, disconnect all cables from the logic board.
Note: There are 14 cables you will be disconnecting from the logic board.
3. Using a magnetized #1 Phillips screwdriver, remove the eight black logic board mounting screws.
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: Also check that the two bumpers are in place by the upper processor on the top side of the logic board. 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 to 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.
PCI Express/graphics cards AirPort Extreme card (if installed) Bluetooth card (if installed)
You must also transfer the back ports EMI shield to the new board.
Replacement Note: To replace the logic board, tilt the board as illustrated and lower it into the enclosure.
Note: Unlike in earlier Power Mac G5 computers, replacing a logic board in Mac Pro does not require running Apple Service Diagnostic for thermal calibration.
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