[X4U] Trouble waking from sleep and restarting....

[Samantha Cornell]

I don't want to jump the gun and assume that I have a problem 
but...this is the one machine that I cannot afford to have a problem 
with.

When waking my iMac G4 (512 MB RAM, 1GHz, 10.3.9) from approximately 5 
hours of sleep, I was greeted with not only a frozen screen, but one 
with thin vertical rainbow pinstripes and one thicker black horizontal 
line. Key strokes were unable to resolve the problem, and I was 
eventually forced to cut the power, wait a few moments, and restart.

Restarting was unsuccessful, and I got to a grey screen with barely 
noticeable grey vertical pinstripes, and was unable to proceed.  Once 
again, I cut the power, restarted, and this time everything seemed 
fine.  I've verified permissions and all is good, but I can't help but 
worry that there is an underlying problem that I am missing. I could 
survive without my laptop, but I rely on my desktop for work.

Has anyone heard of such a thing?  I have googled it rather 
unsuccessfully. What else should I check to ensure that all is okay?

Thanks a bunch!

Samantha