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 149
Symptom Charts
How to Use the Symptom Charts
The Symptom Charts included in this chapter will help you diagnose specic symptoms related
to the product. Because cures are listed on the charts in the order of most likely solution, try
the cures in the order presented. Verify whether or not the product continues to exhibit the
symptom. If the symptom persists, try the next cure.
Note: If a cure instructs you to replace a module, reinstall the original module before you
proceed to the next cure.
Important: The only way to shut o power completely to the computer and display is to
disconnect their power plugs from the power source. Make sure the power cords to the
computer and display are within easy reach.
Startup Failures
When testing a computer for the following symptoms, remove the side access panel so you can
better observe or listen for fan movement.
Note: Be sure to check the “Memory” and “Power-On Self Test” topics in the General Information
section of this chapter. Incorrect installation of DIMMs or incompatible memory will not allow the
system to start up correctly. For information on how to correctly install DIMMs, see the “Memory
(DIMMs)” topic in the Take Apart chapter.
Important: For troubleshooting purposes, Mac Pro (8x) computers may be started up and
diagnosed with a single processor installed in either the upper (CPU A) or lower (CPU B) position.
Power-on LED does not illuminate when power button is pressed, fans do not
spin, and there is no boot tone or video
Verify power outlet is good. 1.
Check that diagnostic LED 1 is on when the power cord is connected.2.
Replace power cord. 3.
Check that diagnostic LED 1 is on when the power cord is connected.4.
Reset the logic board. Refer to “5. Resetting the Logic Board” in this chapter.
Verify power supply cables are fully connected. 6.
Verify that processors are properly seated. Check diagnostic LED 2 and/or LED 3. 7.