Apple power mac g5 late 2004 User Manual

							
 Power Mac G5 (Late 2004) Troubleshooting - 
 
10
 
 Symptom Charts 
Power-on LED does not illuminate when power button is pressed, but fans 
spin, boot tone chimes, and there is video
 
1. Reseat front panel board cable
2. Replace front panel board cable
3. Test the front panel board and power button using the front panel board  troubleshooting tool. Refer to “Front Panel Board Troubleshooting” in this chapter. If 
the computer starts up correctly, go to step 4. Otherwise, go to step 7.
4. Test whether the front panel board or power button is at fault. Remove the installed  front panel board and swap it for the known-good front panel board in the front panel 
board troubleshooting tool. Then connect the troubleshooting tool to the logic board of 
a known-good Power Mac G5 and start it up using the tool. If the computer does not 
start up correctly, go to step 5. Otherwise, go to step 6.
5. Replace front panel board
6. Replace power button
7. Replace logic board 
Other Failures
 
Power Mac G5 (Late 2004) 1.8GHz models stop responding randomly
 
See Knowledge Base article 302212. 
Air de flector sensor board
 
1. Reseat air de flector sensor board cable
2. Replace air de flector sensor board
3. Replace logic board
4. Replace enclosure 
Hard drive (kernel panics, hard drive does not mount, or performance slows 
when second hard drive is installed)
 
1. Replace hard drive guide screws
2. Replace hard drive 
Optical drive
 
1. Replace optical drive cable
2. Replace optical drive
3. Replace logic board 
						

							
 
Power Mac G5 (Late 2004) Troubleshooting -   
11
 
 Symptom Charts 
FireWire port (front panel A)
 
1. Reseat front panel board cable
2. Replace front panel board cable
3. Replace front panel board
4. Replace logic board 
Firewire port (rear AB)
 
Replace logic board 
Firewire port (rear BB)
 
Replace logic board 
Internal speakers (left or right fails, boot tone)
 
Replace logic board 
Internal speakers (high-pitch tone)
 
1. Replace power supply
2. Replace logic board 
USB 2.0 (front port)
 
1. Replace front panel board cable
2. Replace front panel board
3. Replace logic board 
USB 2.0 (rear-top port or rear bottom port)
 
Replace logic board 
Modem
 
1. Replace modem
2. Replace modem  filter board
3. Replace logic board 
AirPort
 
1. Replace AirPort Extreme Card
2. Replace antenna card
3. Replace logic board 
						

							
 
Power Mac G5 (Late 2004) Troubleshooting -   
12
 
 Symptom Charts 
Bluetooth
 
1. Replace Bluetooth card
2. Replace antenna card
3. Replace logic board 
Audio IO (front line in  headphones)
 
1. Replace front panel board cable
2. Replace front panel board
3. Reposition logic board
4. Replace logic board 
Audio IO (rear line in  line out)
 
Replace logic board 
Audio IO (rear line out  line out)
 
Replace logic board 
Fans 
Individual fan failure
 
1. Replace fan Exception: The drive fan located between the optical and hard drives can\
not be 
replaced. You must replace the enclosure for this part.
2. Replace logic board 
Media bay fan runs at high speed
 
Note:  
 If any of the following three conditions cannot be veri fied, the red LED on the logic 
board near the front panel board will be lit.
1. Verify that the clear plastic air de flector door is in place.
2. Verify that the white sensor label is not damaged and is in place on the lo\
wer right tab  of the air de flector door.
3. Verify that the air de flector sensor board is operating properly.  
Note:  
 You can differentiate a bad sensor label from a bad sensor board by doi\
ng the 
following: Remove the air deflector door. Slide a folded piece of paper \
through the 
slot in the enclosure where the right tab of the air deflector would nor\
mally be 
inserted. If the red LED goes out (but stays on with the door in place)\
, the sensor 
label on the door is missing or damaged. 
						

							
 
Power Mac G5 (Late 2004) Troubleshooting -   
13
 
 Symptom Charts 4. Check the sensor board cable connection on the logic board (second from right 
connector located directly below the hard drives).
5. Replace the logic board.
6. Replace the air de flector sensor board. 
						

							
© 2004 Apple Computer, Inc. All rights reserved.
 Service SourceViews
                  Power Mac G5 (Late 2004) 
						

							
Power Mac G5 (Late 2004) Views - 1
 Exploded Views
Exploded Views
Exploded View 1
Video Card
661-2921
661-3230
661-3231
661-3332
Gigabit Ethernet Card
661-3172
Apple Fiber Channel Card
661-1763
661-3375
Serial ATA Hard Drive
80 GB 661-3268
160 GB 661-3136
250 GB 661-3261
Super 
Drive
661-3265 Combo  Drive
661-3264
Optical Drive
EMI Shield 922-6036
Power Supply
350 W 661-3337
450 W 661-2903      Rear 
Exhaust
Fans
922-6566
Heatsink
Cover
922-6498
Enclosure
922-6463
Speaker
922-6639 Speaker/
Fan
Bracket
922-6029
Fan
076-1116
Front Panel Board 922-5979
Power Button076-1065 
						

							
Power Mac G5 (Late 2004) Views - 2
 Exploded Views
Exploded View #2
PCI Divider
922-6478
PCI Card Guide 922-5958
Modem Board (Soft)
922-6492
BlueTooth Card 922-6530
Front Panel
Board Cable 922-6482
DIMMs, DDR 400
128 MB 661-3442
256 MB 661-3443
512 MB 661-3444 1 GB 661-3445
Port Shield922-6206
Logic Board with Processor 661-3335
Battery
922-6476 
						

							
Power Mac G5 (Late 2004) Views - 3
 Screw Matrix
Screw Matrix
922-4332
Video card port bracket  922-5846
Modem, Bluetooth card, 
front panel board922-5972
Power supply bottom case
922-5974
Logic board, PCI divider  Logic Board922-6024
PCI fence, AGP/PCI cards
922-6035
er 922-6305
iv
Logic Board Speak Optical dr e 
922-6169
Power supply top cover 922-6252
Modem plug, antenna brd. 922-6253
Hard drive 
10
5 20
15mm10
5 20
15mm
922-6027 
10
5 20
15mm10
5 20
15mm10
5 20
15mm
10
5 20
15mm10
5 20
15mm
10
5 20
15mm10
5 20
15mm10
5 20
15mm
922-6479
10
5 20
15mm
10
5 20
15mm 
						

							
Power Mac G5 (Late 2004) Views - 4
 Internal Views
Internal Views
Overview
Bottom Hard Drive Bay Top Hard Drive Bay
Optical Drive
Slot 1: AGP 8X Pro Slot
(Graphics Card Installed)
DDR SDRAM Slots (4) Slots 2—4: PCI Slots
Battery
AirPort Extreme
Card Connector 
						

							
Power Mac G5 (Late 2004) Views - 5
 Internal Views
Logic Board
Power Supply
Connector   
Optical Drive Connector USB 2.0 Port
USB 2.0 Port
FireWire 400 Port
FireWire 800 Port
Ethernet Port
Power
Supply
Connector
Antenna Board Audio Line Out
Audio Line In
Optical Digital Audio In
Optical Digital Audio Out
Media Fan Connector
Lower Hard Drive
Cable Connector
Media Bay Sensor
Board Connector
Speaker
Connector
DIMM Slots
PCI Fan
Connector
Modem Connector AirPort
Connector Front Panel Board
Cable Connector
Battery
Modem
Filter Board
Processor
AGP Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
Upper Hard DriveCable Connector
Blue tooth Connector