Yes my 20" iMac (2.0GHz/Revision B) has decided to crap itself. Just got home to expect it to be recording Lost with my EyeTV. Instead I find it's switched itself off. Not in sleep mode, nothing, just completely off. I tried to power it on but nothing. It is emitting a little squeaking noise (don't laugh!) every second or so. I left the room for a few mins and then heard the start-up chime... I popped my head round the corner to observe it attempting to power on. The screen lit up then it all powered down again; sleep light flashed on and off about 3 times or so and then went back to nothing but that strange squeaking sound. I've unplugged it, replugged it, removed all FireWire devices etc. I cannot power it on and I'm just hearing this little squeaking noise. So presumably the PSU is fried or something then? Is there anything I can/should do? It's already had a replacement PSU fitted a few months ago. Sorry, it's late, I'm pooped and haven't searched the forums properly - please feel free to slap my wrists for that - is this a common problem? I bet someone's going to post a link to the iMac G5 video/power issue thingymajig but AFAIK that applies to Rev A machines not Rev B. Cheers.