Hi everyone,

I have a Macbook A1181 running OS X 10.4.1. After about 10-15 minutes of sitting idle (though sometimes at random times), the LCD will turn completely white and stay like that for a number of minutes before turning black and going back to normal. I've tried using TechTool Pro 4 (passed everything) and left it running for a number of days, but could not reproduce the problem when booted off the CD - just inside the operating system.

Before I take this whole thing apart, does anyone have any idea what this could be?