Garbage Video

Garbage video refers to erroneous text or characters that appear on the screen.

Possible Cause

Possible Fix

Corrupted system software.

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.

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