Boot seems to need a kick start. Any ideas?

Double check the RAM is firmly and squarely seated in the slots, verify cable connection between power supply and logic board. Run the hardware test disk it may give you more information.

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Thanks. Have done that but can't run the hardware test as doesn't get far enough into the boot for that. Anyway where is that on the new iMacs?

Jul 10, 2012 by Nick Sexton

What do the LED diagnostics indicate. Sounds like a power supply or logic board issue. I agree you should probably contact Apple Support even if you are out of warranty there could be a silent recall on this.

Jul 12, 2012 by originalmachead

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Thanks. Have done that but can't run the hardware test as doesn't get far enough into the boot for that. Anyway where is that on the new iMacs? — Nick Sexton
What do the LED diagnostics indicate. Sounds like a power supply or logic board issue. I agree you should probably contact Apple Support even if you are out of warranty there could be a silent recall on this. — originalmachead

Dan @danj Rep: 478.9k Self employed contract worker 35 329 970 · Answer 1 · 2012-07-11T19:18:13-07:00

Dan @danj

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Posted: Jul 11, 2012

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How new? If it's still under warrantee bring it back for repair or exchange.

If not do you have your system plugged in a good surge strip or UPS (I highly recommend it!) If not you could have been hit by a power surge or lightning.

Before we can go any further, what is the last four digits of your serial number so we can figure out which model you have.

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