Troubleshooting Symptom/Cure Tables: System Problems After Startup - 34
Garbage Video
Garbage video refers to erroneous text or characters that appear on the screen.
Possible Cause Possible Fix
Corrupted system soft-
ware.
Boot from the system CD that came with the unit. Open
the Monitors and Sound control panel and change the
Maximum Resolution and Color Depth to their maximum
settings. Restart the unit. Does the screen display appear
normal now?
Yes: Reinstall system software. (You must use the
system software CD that came with the unit to get the
correct version of Mac OS.) If the problem persists, go
to the next step.
No: Go to next step.
Bad logic board. Replace the logic board.