Mid-2009 iMac Issues (Waking from sleep and fans)

[suekitch]

Hi folks,

I have a 24" mid-2009 iMac, bought in June. It's behaving oddly over the past week or so. It fails to wake on sleep on the first attempt, but always succeeds on the second. When I say fails though, I mean that it *does* wake up, but goes back to sleep again after a few seconds.

The other issue happened today, when I woke it up, in a cold room, the fans started up at full speed (I assume). It sounded terrifying to me as my iMac has never got that loud - not even playing games. I restarted it and it was the same, but died down after a while.

Any ideas? Should I be taking it off to the apple store yet?

Cheers!

 

[Hellhammer]

Try SMC reset. Shut it down and unplug all cables for 30 secs and then replug keyboard and mouse if needed

Do PRAM reset too.

Also repair your permissions with Disk Utility

 

[aspidistra]

I had this problem with my old G5 just before the Applecare ran out. I took it in and they replaced the logic board - it seems to be a fairly common problem with the G5. I'd get it looked at if it continues as a logic board fail is pretty serious (and expensive) as far as I know.

 

[suekitch]

Thanks for the PRAM/SMC suggestion. I'll give that a go.

I'm not worried about the expense if it does need a repair though (more the hassle of backing up etc) - three year AppleCare, woo