I saw heaps of the white G3 iBooks come in with the well known video failures and as another poster points out, the 500Mhz machines never had this problem.
Although, the 500Mhz machines did have their own problems. Failure of the DC input connector, cutting of the display cable where it passes around the clutch (or hinge) - a revised rear vent with a larger cut-out for the cable fixes that. I imagine that those repairs would have been done already if one is still functioning today.
I owned one of the 900Mhz machines (a real screamer and the fastest Apple every made a G3). I never had any of the video problems, but I did have an intermittent trackpad (the trackpad cable had a fold that used to break) but small piece of cardboard between the internal frame and top-case kept it going.
There are plenty of people using the
application of extreme heat to re-flow the solder joints on the GPU - not for the faint hearted, and I've never done one myself.
As most point out, if you can find one still going, it will probably keep going, but I'd add that if it's had an easy life sitting on a table and not being used as a portable, then if
you use it as a portable, it might then fail.
A final note, I've seen more than my fair share of failed Toshiba HDs so I'd be looking for one that has had it's HD replaced and at least 60GB
I traded mine in favour of the last G4 iBook, a G4 1.42Ghz 14" with sudden motion and scrolling trackpad which I still use today.
Good luck!
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