HT1767: iMac G5: How to Reset the SMU

Learn about iMac G5: How to Reset the SMU

Mrs Orange St

Level 1 (0 points)

Q: iMac (27", 2011, OSX) will not turn on. Get start up chime and fan noise

Help! have had no previous problems with iMac but today it suddenly either turned off or went into sleep mode during use and will not turn on again. When I press the power button I get the starting sound and can hear the fan but the screen goes completely black and it appears to turn off again. Any suggestions please?

iMac

Posted on May 29, 2013 5:09 AM

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Q: iMac (27", 2011, OSX) will not turn on. Get start up chime and fan noise

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by matt00,

matt00 May 31, 2013 8:56 AM in response to Mrs Orange St
Level 5 (4,015 points)

May 31, 2013 8:56 AM in response to Mrs Orange St

Hi Mrs Orange St,

I understand that you are having issues powering on your iMac. That definitely sounds frustrating.

In my experience, the following article usually provides a resolution:

If your computer doesn't display any video, it may display one or more of these similar symptoms when you press the power button:

You may hear a startup chime.
You may hear fan or drive noise.
You may see the power button or power indicator light up.

Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573

Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367

Thanks,

Matt M.
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HT1767: iMac G5: How to Reset the SMU

Q: iMac (27", 2011, OSX) will not turn on. Get start up chime and fan noise

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by matt00,

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