User Guide
Table Of Contents
- Mac Pro (8x)
- Contents
- Basics
- Take Apart
- General Information
- Opening the Computer
- Hard Drives
- Optical Drive Carrier and Optical Drives
- Memory (FB-DIMMs) and Memory Riser Cards
- PCI Express/Graphics Card
- Power Supply
- Power Supply Fan
- AirPort Extreme Card
- Bluetooth Card
- Battery
- Processor Heatsink Cover
- Front Fan Assembly
- Mac Pro RAID Card and Battery
- Memory Cage with Rear Fan
- Processor Heatsinks
- Processors
- Speaker Assembly
- USB Cable
- Logic Board
- Front Panel Board
- Power Button
- AirPort Antenna Board with Cables
- Optical Drive Power Cable
- Optical Drive Data (Ribbon) Cable
- Ambient Board
- Ambient Board Cable
- Bluetooth Antenna Board and Cable
- Hard Drive Cable Harness
- Hard Drive Temperature Sensor Cable
- Hard Drive Temperature Sensor
- Power Cable Harness
- Troubleshooting
- Upgrades
- Views
Mac Pro (8x) Troubleshooting — Symptom Charts 150
Verify that processors’ mounting clamps are properly tightened. 8.
Test whether the front panel board or power button is at fault. Remove the installed front 9.
panel board and test with a known-good front panel board.
Replace front panel board. 10.
Replace power button. 11 .
Replace power supply. 12.
Replace logic board. 13.
Power-on LED illuminates when pressed in, but goes out when button is released,
there is no boot tone or video, but you can hear a small click
Check diagnostic LED 1 for trickle voltage from the power supply. Refer to “1. Power Supply
Verication” in this chapter. If verication fails, replace power supply.
Verify that the processors are properly seated. Check diagnostic LED 2 and/or LED 3. 2.
Verify that the processor mounting clamps are properly tightened. 3.
Replace the power supply.4.
Power-on LED illuminates when power button is pressed but fans do not spin (or
spin only momentarily) and there is no boot tone or video
Reseat video card. (Make sure video card is fully inserted in connector and end of card is 1.
secured by the connector latch.) For video cards that require power cables, check that they
are connected.
Reset logic board. Refer to “2. Resetting the Logic Board” in this chapter.
Verify power supply cables are fully connected. 3.
Check diagnostic LED 2 and/or LED 3 for processor connection. 4.
Reseat processors and check for bent pins. 5.
Check diagnostic LED 1 for trickle voltage from the power supply. Refer to “6. Power Supply
Verication” in this chapter. If verication fails, replace power supply.
Replace logic board. 7.
Replace processor. 8.
Power-on LED illuminates when power button is pressed and fans spin
continuously but there is no boot tone or video
Reseat video card. (Make sure video card is fully inserted in connector and end of card is 1.
secured by the connector latch.) For video cards that require power cables, check that they
are connected.
Verify speaker cable is fully seated. 2.
Reset logic board. Refer to “3. Resetting the Logic Board” in this chapter.