Technical information

Symptom Charts / USB and FireWire -
21
Troubleshooting
PowerBook (FireWire)
Known-good USB
printer does not print
1. Verify computer has correct driver installed. Check vendor’s
Web site to download current driver.
2. Reset PRAM.
3. Verify printer is selected in the Chooser.
4. Run Apple System Profiler to see if it recognizes the USB
printer is connected. If it does, it is a software issue.
5. Try the other port. Make sure the printer is connected
directly to the computer.
6. Check cables.
7. Replace I/O logic board.
Power-related error
message appears
1. Plug the device into an electrical outlet if it has a power cord.
2. Unplug the device and plug it into another USB port on the
computer or another device plugged into a power outlet such
as a USB hub.
After sleep, a USB
device is sometimes
not recognized
1. Restart the computer.
2. Contact device manufacturer for latest driver update.