iBook resolution problem

[roebuck86]

HELP!

Ok so for some stupid reason I changed the resolution on my iBook to a resolution that is unsupported. Now when I turn my iBook it loads OSX 10.4 perfectly, then the screen goes black and just before it loads my desktop the screen Flashes Red, Green & Blue etc. I can't change the res back to 1024 x 768.

Does anyone know how to get this problem sorted?

Thanks

 

[roebuck86]

I was able to get in loaded up in 1024 x 768. Then I restarted as normal, yet it reverted back to its normal self. So I re-booted in safe mode again, then changed the display to 800 x 600, restarted as normal and it loaded up at 800 x 600. I then tried to change the resolution to 1024 x 768, now once its selected it doesn't turn to 1024 x 768. Nothing changes once 1024 x 768 is selected.

Any ideas? I don't really fancy re-installing the OS