G5 iMac Shuts Down

[spork183]

G5 imac, ALS, new in May, 2005. Has gone through 2 powersupplies, the superdrive, the hard drive, and a midplane? assembly. The last couple of problems have been the powersupplies. Symptoms include sudden shutdowns that become more frequent until it refuses to start at all, just a second of glowing light on the power button, and darkness.

Replacing the powersupply has fixed the problem the last two times. 2 days ago it started shutting down, again. No warning. CPU temp after the last one was in the 68 range, then dropped down to 53 after a bit of light use.

Any suggestions? Replacing the powersupply again doesn't really seem to be a long term fix. I'm somewhat annoyed...

(it is under Applecare, the powersupplies have been diagnosed and replaced by certified geniuses...)

Running 10.4.8, all updates, 1.5gig ram, Seagate 320gb drive.

 

[GimmeSlack12]

Dude, you named the problems in your post. Its time to fight for a replacement iMac.

 

[eji]

Wow. I don't know what to say, other than that I'd demand a new machine by this point. Seriously. It's obviously a lemon.

I just got my iMac G5 back from power supply repair yesterday after the shutdown problems, and all's well. So far, that is. I actually get really worried by stories like yours, which suggest that problems like these might recur even after their supposed causes have been repaired if you've been unlucky enough to wind up with a dud unit.