Well, the top half of the casing gets warm and I can feel the warm air rising when I hold my hand over the top grill. It doesn't seem any warmer than before though. By the way, I was planning a cool light mod, do you think I can add another 10 LEDS, as far as I know LEDS use only a tiny bit of power.

EDIT: I was just wondering, what part(s) exactly are we talking about. Is it the little converter board attached to the mobo or the larger beige board in the 'high voltage compartment'?

Post edited by: yann86, at: 2006/01/20 23:22

Okay, so now the problem I mentioned in my first post seems to be back. The screen was blurry on first boot, then fine for about 6-7 hours and now it just stays blurred. I don't know for sure if it's the PSU, I've been checking part numbers and I'm absolutely sure the 'power down board' is the same on all iMac G3s, also the 'video analog board' (the larger beige one in the crt area) seems to be the same for all revisions. Could it be the CRT itself that's different in later iMacs (needing less power) or something else?

I've been thinking about replacing the CRT with an LCD as seen in the eye-mac mod on this site.

I've just tried connecting an LCD monitor to the built-in VGA, the screen was as blurry as the internal CRT. Can this be explained by the PSU overload theory? The LCD has its own power supply of course.
I'd really want to make sure this isn't a problem with the mobo.

I would suspect heat before power anomalies. Any way you can run it opened up with some temporary extra cooling?
It could also be a bad connection somewhere, I haven't had an iMac open in a long, long time, so I don't recall and most likely points to check, but...

soward wrote:

I would suspect so too if the problem occured a few minutes after booting, but the screen goes blurry right away.

Anyway I seem to have found some more information. The power down board is the same for all models but the video analog board has 3 versions.
661-2212 rev. A and B for 350, 400Mhz models
661-2465 for 450 and up.
There are only minor differences, so I feel kinda screwed over by apple at the moment :angry:

Replacing the video analog board doesn't seem an option as that would cost me quite a bit. So again, this leaves me stranded with the monitor replacement option. This would cost a lot aswell, I know but the difference is I actually get something out of this mod (a shiny LCD monitor).

An LCD would need a whole lot less power....

Waragainstsleep wrote:

That's the whole point of the mod;)