hey guys, i've searched for relating problems, but nothing really was the same as my particular situation. My imac used to flicker a bit...you would see the "shock" in the screen..but then one day, i did it a bunch and just shut down. so i started it up...it chimmed, the orange light was on...it would switch to the green light, and then shut off, right after. but then when i try and press the ON button again, it wont..i have to unplug it for a while, and then it'll do the same process. I already changed the clock battery...that didnt do anything..help!

typical problem with bad flyback transformer. you can try by hooking a mac multisync monitor to the db-15 connector of the imac.

Hmm ... my first thought is a PRAM problem. Sometimes just changing the battery doesn't do the trick. On the logic, there's a small button, normally with the words PMU RESET (or somethihg similar) near it. On Rev.A boards, the button is next to the processor card input. (Although, I've not heard of a Rev.A 500Mhz iMac, unless you've upgraded it.) Remove the battery, press the button once, put the battery in, wait for a minute, and turn on the computer and see if it's more friendly. ----paxcirc.a-

hey guys. thanx for the quick replies... first of all, i did upgrade my computer a while back..hence the 500 mhz speed. i've tried pressing the small button on the computer, but it didnt help. although i dont think i pressed it while the clock battery was out...maybe i'll try that. what i dont get is why i can't try and start the computer again, after i tried once (i have to unplug, then plug in the power)..does anyone know if thats a symptom of the bad Flyback Transformer?? i thought maybe the motherboard just fried..and i'd have to get a new one..(would i have to get one from a RevA model, or would the RevB+ work?) should i try to get a new flyback transformer for it first? even though i have no clue what that is!... thanx for the input. Rich

as I suggested, try hooking up the multisync mac monitor and see if you get the picture on the screen.

hey, thanx budm...now i gotta find time to try that out...the only monitor i have is an old mac monitor that i used for a quadra 605...if the cable does fit, will it work, even though the monitor was used for a 256 color? (or does that even matter?) where is the flyback transformer located, exactly? anyone know where to purchase one? thanx a lot. rich

Your old monitor from the Quadra should work. This is exactly what happened to my iMac, and what I did was I went out and bought a 19inch monitor, and a signal converter. I was up and running in no time. Good Luck. FYI: Later on I ripped the gutz out of my imac and mounted them in a briefcase, no joke. Still works too!