Apple power mac g4 fw 800 User Manual

 
Power Mac G4 (Mirror/FW800) Troubleshooting -   
17
 
 Symptom Charts 
System shuts down when using multiple FireWire devices and an Apple ADC 
17 CRT display is connected
 
The power requirements for multiple FireWire devices and the Apple ADC 17 CRT display 
may exceed the capacity of the power supply, causing it to shut the system down. To 
alleviate this problem, do the following: 
1. Reduce the number of bus-powered FireWire devices 
2. Use a power adapter with all FireWire devices 
3. Reduce...

 
18 -   
Power Mac G4 (Mirror/FW800) Troubleshooting  Symptom Charts 
Error Tones
 
Note:  
 Error tones occur before system software loads. 
Computer beeps once at startup
 
One beep means that no RAM is installed or detected.
1. If no DIMM is present, install a known-good DIMM in the top slot and try again. 
2. Reseat the DIMMs.
3. Replace the DIMMs one at a time and test until all bad DIMMs are replace\
d with  known-good modules.
4. Check that the processor module is properly installed.
5. Replace...

 
Power Mac G4 (Mirror/FW800) Troubleshooting -   
19  
 Symptom Charts 1. Replace the processor module. Refer to Before Replacing the Processor in this 
chapter.
2. Replace the logic board.
Video
Screen is black, but startup chime is present, drive operates, fan is running, 
and power LED is lit
1. Check video cable/card connections and connector pins.
2. Test with a known-good monitor. Replace the monitor, if necessary.
3. Remove all third-party devices.
4. Reseat the video card.
5. Clear parameter...

20 - Power Mac G4 (Mirror/FW800) Troubleshooting
 Symptom Charts
5. If using more than one display, make sure primary display is connected to video card.
6. Reseat the processor module.
7. Replace the processor module. Refer to Before Replacing the Processor in this 
chapter.
8. Replace the logic board. 
Video is distorted
1. Make sure that the video card driver and  firmware are updated to the most recent 
versions.
2. Refer to the adjustments section of the service manual or owner’s manual for the...

Power Mac G4 (Mirror/FW800) Troubleshooting - 21
 Symptom Charts • a VGA monitor using a DVI-to-VGA adapter
• a DVI-to-VGA adapter that does not have a monitor connected to it
Update to the latest version of Mac OS X. To download and install an update via the 
automatic Software Update feature in Mac OS X, choose System Preferences from the 
Apple menu, choose Software Update from the View menu, then click Check Now. Any 
available updates will be listed in Software Update. 
Sound
No sound from...

22 - Power Mac G4 (Mirror/FW800) Troubleshooting
 Symptom Charts
a second startup chime.
4. Reinstall system software.
5. Replace the Apple Pro Speakers.
6. Replace logic board. 

Power Mac G4 (Mirror/FW800) Troubleshooting - 23
 Symptom Charts
Fan interference heard through headphones
1. Plug headphones directly to the sound output port on the front of the computer.
2. Connect all other audio devices to the sound output port at the rear of the computer.
Note:   If headphones are connected through audio devices, such as grounded speakers, 
or mixers, and these devices are connected to the headphone sound output port, you may 
hear fan interference through the headphones.
Clicking...

24 - Power Mac G4 (Mirror/FW800) Troubleshooting
 Symptom Charts
Hard Drive
Single internal ATA drive does not spin; flashing question mark on screen
1. Check all cable connections to the hard drive.
2. Try another power connector on the power cable harness. If the power cable is 
defective, replace the power supply.
3. Replace the hard drive. If the problem is resolved, make sure the driver and system  software are updated to the most recent versions.
No internal SCSI drive icon appears on the desktop...

Power Mac G4 (Mirror/FW800) Troubleshooting - 25
 Symptom Charts
No external SCSI drive icon appears on the desktop
1. Verify there are no duplicate SCSI device addresses.
2. Verify the total cable length does not exceed the maximum total cable length for the 
SCSI card. See Knowledge Base article 58204.
3. Reseat the SCSI cable going to the SCSI card.
4. Replace the terminator on the external SCSI device.
5. Reseat the SCSI card.
6. Replace the SCSI card. For the Power Mac G4 (FW 800) model, this is a...

26 - Power Mac G4 (Mirror/FW800) Troubleshooting
 Symptom Charts
Optical Drive
Optical drive tray won’t open 
1. Before opening the computer, try the following:
Note:  When following the steps below make sure that there is power to the com\
puter 
and to the Apple Pro Keyboard and Apple Pro Mouse. 
If in Mac OS 9.2,
• Press the Eject key on Apple Pro Keyboard.
• To open the second optical drive on a Power Mac G4 (Mirrored Drive Door\
s)  computer, press Option-Eject on the Apple Pro Keyboard.
• Open the...