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iMac Intel 24" EMC-2267- lessons learned

bdmccaig -

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Absolutely no life at all. No lights, no bong, no sounds. Customer insisted it was working the day before and just quit. Screen black and iMac completely dead.

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Preliminary diagnosis was the Power Supply which was proved correct by quick test with a Power Supply from another iMac.

Ordered new part which arrived within 3 days...fantastic! Re-assemby took 20 minutes. Testing and back to customer within same day.

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When new Power Supply arrived it at first did not work very well...faint screen...and resembled the PS from a slightly different iMac instead of the 2267. Quick call to IFIXIT, who verified the correctness of the shipment but agreed to ship another one just in case. Re-tried the 1st Power Supply after resetting the PMU (option-command-P-R, Power) four times, which cleared up the screen issues. Quickly called IFIXIT and they were able to cancel the second PS. Moral: always check the PMU by reseting it before calling a failure.

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