Fan blowing after restart

Question

Fan blowing after restart

We lost power at our house a while ago and my compter was on, plugged into a surge protector power strip. When I pushed the power button to restart it, there was no response. I tried several times, then intermittently, I could hear the fan come on for a second or two, then go off again, with nothing appearing on the display.

I unplugged all of the periferals, then tried restarting it again, I heard the start-up "chime," then the fan started running at full.

As I type this, the fan is still running at what I would describe as "max."

Is there something I should do other than just wait?

Thanks in advance.

Gary

iMac 27, Mac OS X (10.6.8), Two OWC 250 GB 400 Firewire Drives; 1 OWC 1TB 800 Firewire driv

Posted on Mar 25, 2012 12:20 PM

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Answer 1

Best reply

X423424X

Level 6

14,265 points

Mar 25, 2012 12:31 PM in response to Gary Markovich

Try smc and pram reset.

Use your installer DVD and see if it will boot and then run Disk Utility from it to repair/verify your drive(s).

Use the second installer dvd to run Apple Hardware Test (press D after the boot chime).

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Answer 2

captfred

Level 7

26,422 points

Mar 25, 2012 12:34 PM in response to Gary Markovich

This is a special diagnostics mode that's entered when line voltage is applied while the power button is held down. The SMC reset that x423424x refers to will fix it.

Regards,

Captfred

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Answer 3

Mar 25, 2012 3:32 PM in response to Gary Markovich

I searched some other threads, and tried the SMC reset, however I had the same result upon restart. I unplugged it from the wall (another thread's suggestion), restarted, and now seems to work fine.

Thanks for your suggestions.

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Answer 4

X423424X

Level 6

14,265 points

Mar 25, 2012 3:48 PM in response to Gary Markovich

I still suggest you run Disk Utility to verify your drives since a power failure could potentially leave the drives in an indeterminate state.

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