Apple mac pro early 2008 User Manual

Mac Pro (Early 2008) Troubleshooting — General Information 161
Processor Heatsink and Processor Visual Inspection Instructions
The Mac Pro (Early 2008 Dual 3.2 GHz) computer uses a special coating on the processor 
heatsink and processor to manage the temperature in the computer. Before installing a new or 
existing heatsink or processor, always make a visual inspection of the part. Specifically, check 
the application of the silver-colored coating on the underside of the heatsink and the top of 
the...

Mac Pro (Early 2008) Troubleshooting — General Information 162
Unacceptable examples
The following are examples of unacceptable applications of the coating. Return new parts or 
replace existing parts that exhibit similar applications. 
Void IVoid IISplash
Void I: The silver-colored coating shows missing areas of within the normal coated area.
Void II: The silver-colored coating shows missing areas along the edge of the coated area.
Splash: The silver-colored coating extends beyond the normal coated...

Mac Pro (Early 2008) Troubleshooting — General Information 16 3
To remove the particles, use the suction pipette that comes with the replacement heatsink and 
processor. ( The pipette is also available through GSX as part of the Mac Pro Grease Kit, part 
number 076-1258.) Depress the bulb end of the pipette, place the other end over the particle, 
and release the bulb. The particle will be suctioned into the pipette. 
Once you have removed all stray particles, place the pipette inside the resealable bag...

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 16 4
Symptom Charts
How to Use the Symptom Charts 
The Symptom Charts included in this chapter will help you diagnose specific 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...

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 165
Verify that processors are properly seated. Check diagnostic LED 3 and/or LED 4. 7. 
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...

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 166
Reset logic board. Refer to “3. Resetting the Logic Board” in this chapter. 
Check diagnostic LED 3 and/or LED 4 for processor connection 4. 
If only one of the CPU Error LEDs (LED 3 or 4) comes on, try swapping the processors. If the 5. 
Error LED follows the processor to the other processor location, replace that processor.
Replace logic board 6. 
Power-on LED illuminates when power button is pressed, fans spin, and boot tone 
chimes, but there...

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 16 7
Fans 
Individual fan failure 
Verify fan is properly connected.1. 
Verify all other fans are working properly. If all fans seem to have failed, the problem is most 2.  
likely not the fans. Reset the logic board to see if this resolves this problem.
Replace fan3. 
Replace logic board 4. 
Fans run at high speed (computer may shut down or may just hang and not shut 
down as a result)
Check for proper ventilation around the exterior of the computer....

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 168
Check for proper ventilation around the exterior of the computer. 3. 
Remove the computer’s side access panel and observe the diagnostic LEDs, specifically LED 4. 
5 and LED 6 (the CPU A and B Overtemp LEDs). Refer to “Diagnostic LEDs” in this chapter 
for more information on how to locate and interpret these LEDs. If either of these LEDs is 
flashing, this may indicate an initial processor over temperature condition. If either of these 
LEDs is...

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 16 9
Bluetooth Card
Bluetooth Card does not appear to function and is not recognized by System 
Profiler
Start up the computer from a known-good volume (such as an external hard drive) with 1. 
Bluetooth driver software installed, to isolate the issue to software or hardware. If the 
computer seems to perform adequately when booted in this way, troubleshoot as a software 
issue. If the computer continues to exhibit the issue, follow the steps below....

Mac Pro (Early 2008) Troubleshooting — Symptom Charts 170
Front Panel FireWire port 
Reset SMC.1. 
Reseat front panel board cables2.  
Replace front panel board cables3. 
Reseat front panel board 4. 
Replace front panel board 5. 
Replace logic board 6. 
Rear FireWire port 
Reset SMC.1. 
Replace logic board 2.  
Front Panel USB 2.0 port 
Reseat front panel board cables1. 
Replace front panel board cables2.  
Reseat front panel board 3. 
Replace front panel board 4. 
Replace logic board 5. 
Rear Panel USB...