Apple mac pro 8x User Manual

							Mac Pro (8x) Troubleshooting — Symptom Charts 151
Check diagnostic LED 2 and/or LED 3 for processor connection 4. 
If only one of the CPU Error LEDs (LED 2 or 3) 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 is no video 
Verify display is properly connected and powered on.1. 
Check video card connector and display cable for any bent pins.2.  
Reseat video card. (Make sure video card is fully inserted in connector and end of card is 3. 
secured by the connector latch.) For video cards that require power cables, check that they 
are connected. 
Reset PRAM (restart computer while holding down Command-Option-P-R keys until second 4. 
boot tone chimes) 
Reset logic board. Refer to “5. Resetting the Logic Board” in this chapter. 
Replace video card 6. 
Replace logic board 7. 
Power-on LED does not illuminate when power button is pressed, but fans spin, 
boot tone chimes, and there is video 
Reseat front panel board 1.  
Replace front panel board 2.  
Replace logic board 3. 
Replace power supply 4. 
Power-on LED illuminates, fans spin up, no boot tone, and the system shuts down 
within a few minutes 
Open the side access panel and observe all diagnostic LEDs. Refer to “1. Diagnostic LEDs” in 
this chapter for more information on how to locate and interpret these LEDs. Troubleshoot 
further if any LEDs indicate any failure.
Reseat the processors and check for bent pins 2.  
Replace the processors3. 
Replace the logic board 4. 
Replace the power supply 5.  
						

							Mac Pro (8x) Troubleshooting — Symptom Charts 15 2
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. 1. 
If the system is operating normally except for all fans running at full speed, try resetting the 2.  
SMC.
If the system appears to be hung (unresponsive), then it’s normal behavior for all fans to 3. 
ramp to full speed.  In this case, troubleshoot any possible operating system, RAM, processor, 
logic board, and power supply issues, in that order.
Remove the computer’s side access panel and observe the diagnostic LEDs, specifically LED 4. 
4 and LED 5 (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 LED is flashing, it may 
indicate an initial processor over-temperature condition. If either LED is solidly on, it may 
indicate a chronic processor over temperature condition.
Verify proper processor heat sink installation (see the take apart section for more information 5. 
on heat sink installation).
Verify all thermal sensors and their cables are properly connected, especially the ambient 6. 
temperature sensor board.
Verify all fans are operating properly and are unobstructed, especially the front intake fan.7. 
Verify that the proper type of memory is installed. (See “8.  Memory” in the Take Apart chapter 
for more information.)
Replace power supply.9. 
Computer performance seems sluggish or slow, or computer is completely hung
Start up the computer from a known-good volume, such as its Installation disc, or an external 1. 
hard drive, 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 perform sluggishly when booted this way, continue following the steps below.
Run Apple Service Diagnostic to verify hardware is functional. Address any diagnostic failures 2.  
as necessary. 
						

							Mac Pro (8x) Troubleshooting — Symptom Charts 15 3
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. 
4 and LED 5 (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 solidly on, this may indicate a chronic processor over temperature condition. Initial 
processor over-temperature can cause symptoms such as sluggish computer performance. A 
chronic processor over-temperature condition can cause the computer to hang completely.
Verify proper processor heat sink installation. (Refer to “5. Processor Heatsinks” in the Take 
Apart chapter for more information.)
Verify all thermal sensors and their cables are properly connected, especially the ambient 6. 
temperature sensor board.
Verify all fans are operating properly and are unobstructed, especially the front intake fan.7. 
AirPort Extreme Card
AirPort Extreme 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.  
AirPort 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. 
Reseat card and antenna cables connected to card 2.  
Replace card 3. 
Replace logic board 4. 
AirPort Extreme Card does not appear to function or has weak performance and is 
recognized by System Profiler
Start up the computer from a known-good volume (such as an external hard drive) with 1. 
AirPort 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. 
Reseat card and antenna cables connected to card 2.  
Replace card3. 
Replace logic board4. 
Replace AirPort Extreme antenna board / cable assembly5.  
						

							Mac Pro (8x) Troubleshooting — Symptom Charts 154
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. 
Reseat card and antenna cable connected to card2.  
Replace card3. 
Replace logic board4. 
Bluetooth Card does not appear to function or has weak performance and is 
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. 
Reseat card and antenna cable connected to card 2.  
Replace card3. 
If poor signal strength is the issue, replace the Bluetooth antenna board / cable assembly4. 
Replace logic board5. 
Other Failures 
Optical drive 
Try different optical media.1. 
If two drives are installed, check the Master/Slave or Cable Select jumpers on both optical 2.  
drives (this will depend on drive vendor). Both drives should be set to ‘Cable Select’ mode for 
proper operation.
If two drives are installed, test one optical drive at a time by disconnecting one of the drives 3. 
to see if the other one works.
Replace optical drive cable 4. 
Replace optical drive 5. 
Replace logic board 6.  
						

							Mac Pro (8x) Troubleshooting — Symptom Charts 15 5
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 2.0 port
Replace logic board 
Internal speaker 
The Mac Pro (8x) should emit a startup chime through its internal speaker, regardless of 1. 
whether headphones or external speakers are connected.  If you hear a normal startup 
chime, but no other audio is produced from the internal speaker, and there is nothing 
connected to either audio-out port, suspect a damaged front panel headphone port or rear 
audio-out port.  In this case, replace the front panel board or logic board as necessary.  If you 
do not hear a startup chime through the internal speaker, even after resetting PRAM, follow 
the steps below.
Check the sound output settings in the Sound preferences to ensure the internal speaker is 2.  
selected.
Check speaker cable connection 3. 
Replace speaker4. 
Replace logic board 5.  
						

							Mac Pro (8x) Troubleshooting — Symptom Charts 156
Audio IO (front headphones) 
Start up the computer from a known-good volume (such as its Installation disc or an external 1. 
hard drive), 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. 
Reset PRAM2.  
Reseat front panel board 3. 
Replace front panel board 4. 
Replace logic board 5. 
Audio IO (rear audio line in; rear audio line out) 
Start up the computer from a known-good volume (such as its Installation disc or an external 1. 
hard drive), 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. 
Check Sound settings in System Preferences 2.  
Reset PRAM3. 
Replace logic board 4.  
						

							© 2007 Apple Inc. All rights reserved.
 Service Source 
Upgrades
Mac Pro (8x) 
						

							Mac Pro (8x) Upgrades — AirPort Extreme Card 15 8
AirPort Extreme Card
Important: The computer enclosure includes AirPort antenna wires and a Bluetooth antenna 
wire. The Bluetooth antenna wire looks similar to the AirPort antenna wires, except that it 
includes a “BT” label. For proper operation, be careful not to connect the Bluetooth antenna wire 
to the AirPort card or any AirPort antenna wire to the Bluetooth card. 
Note: You may connect the AirPort antenna wires to either AirPort card connector.
Tools
The only tool required for this procedure is a magnetized jewelers Phillips #1 screwdriver.
Preliminary Steps
Before you begin, open the computer, and lay it on its side with the access side facing up.
Part Location 
						

							Mac Pro (8x) Upgrades — AirPort Extreme Card 15 9
Procedure
Connect the AirPort antenna wires to the connectors on the card. 1. 
Important: Be sure to connect the wires that are marked 1 and 3 to the card; the antenna 
wire that is marked 2 should be taped out of the way. 
Insert the AirPort Extreme card into its logic board connector at an angle, as illustrated. Then 2.  
lower the screw end of the card down to the standoffs on the logic board.  
						

							Mac Pro (8x) Upgrades — AirPort Extreme Card 160
Install the two AirPort Extreme card mounting screws.3.