PROBLEM: The display randomly fades in and out and resizes the 1024X768 display into a 640X480 window surrounded by black. Checking the Display section in System Preferences shows the display settings for "Color VGA" and "Color LCD." Setting the "COLOR VGA" display to 1024X768 @ 85Mhz resolves the 640X480 window problem, but the fading in and out persists.
SOLUTION:
- Turn off the computer
- Hold down Option+Command+P+R and turn on the computer. This is the parameter RAM reset key combination.
- You will hear the Mac "ding." Continue to hold down this key combination until you hear four "ding" sounds. This zaps the PRAM
- Immediately after the fourth "ding," hold down Option+Command+O+F to boot into open firmware.
- Type the reset-nvram and hit return, then type reset-all and hit return.
- Now, hold down Option-S to boot into the command line in single-user mode
- Type fsck -y and hit return. This will run a file system check. My check resulted in two errors in the multi-linked files.
- If you get any sort of error, keep running fsck -y until the check returns no errors on the volume. If you see everything is OK, proceed to the next step.
- Type exit and hit return.

