here is some update. i just got smile mac with nomal bong sound. i had replaced the 10 ram and 1 74s244. but actually 74s244 was not problem. the problem was just ram only. …

wow that is hard-core mike.   thanks for that info.

the flyback is bad.  no ifs ands or buts about it. I had changed a couple out in G3 AIOs way back in the day for this exact issue. the flybacks were made by goldstar and hungwa or…

Faster than before, or faster than another machine? I'd love to see these compared to a G5 Quad.

Little news : I have found a 'patched' version of 10.4.3, with the original kernel, and it works. I can launch Intel apps without problem, when i found a Tiger compatible version.…

From my experience the PowerMac 5500's had flyback issues also... basically it was just a matter of whether the logic board would last long enough for the flyback to fail. lol. So …

I gave up and gave the board to a friend who has professional equipment for removing things like chips. The right equipment does a nice job without the damage I would do.

was it tough getting that old filter out buddy?

Couldn't have done it without your help!

cool u da man!!!

BMOW, I don't recall if it happened when I booted from the floppy. It did happen when booted from an external drive though.

Sorry Indidnt take a photo, but Rlfen described it correctly. I can't take a photo now, because the problem has been fixed. Thanks to C and uniserver, Bourne filters have been rep…

put it in a room with Air conditioning, or a dehumidifier. 

let it run for a couple hours.. it should go away.

After about 30 minutes in, it began popping more consistently and frequently. About two minutes between each pop. What is the process for testing a flyback?

yeah if its still doing it after a couple hours, then it might be the flyback doing something that it shouldnt.

That I have not. I was wary since the loud pops the iMac could make scared me too much. I'm just a little too jumpy for that! :O I'll leave it on in the back of the office and tr…

did you let it sit on for a couple hours?

I gave the CRT, Analogue, and Power Board a good dusting, hooked it all up, and powered it back on. The screen still pops, though not as violently or loudly. This one is a head scr…

If it's just a dusting, that'll make things so much smoother. I disassembled it just in case I need to get to the analogue board. The entire enclosure was caked in heavy amounts of…

i found that if leave them on for a few hours, that noise stops.   seem they do that due to moisture and dust build up. if you can blast them out with the air compressor that woul…

Dandu said: For the BIOS, the chip is on a support, and a colleague can help me to dump directly the content, i will try that next week. Click to expand... Awesome inform…

Here is the thread. It's still pending, the work is simple enough to do, but with his move, wthww has been pretty short on personal time and connectivity to make the fixes.

I don't know if they're prone like the early iMacs, but it's definitely an known issue. Probably needs an analog board recap.