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iMac 20 late 2006 power on failure

Hi everyone,

I have a question about iMac intel 20 late 2006.

The cap on logic board can make a power on failure?

The display remains black , no sounds, all led on, three diagnostic LEDs and front LED, fan running...

I replace ram, reset the SMC and replace Power Supply from from an other imac , disconnect all device: hd, airport and bluetooth card, Optical Drive, nothing.

I tested Inverter Assembly and LCD...Nothing.

The logical boadr seems to be out of order.

Observing logic boadr I have found some caps, can make a power on failure like imac G5?

Thanks to all.

P.S.

sorry for my bad english :(

Answered! View the answer I have this problem too

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Although not nearly as common as the bad caps in the iMac G5s, I've found bad caps in some of the early Intel iMacs. If you find that any of your caps are swollen and/or corroded, your logic board may fail. See if your logic board is the Apple part # 820-1766-A. If so follow this link to get the correct caps: http://jimwarholic.com/2010/02/isight-g5...

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Thanks mayer, but my imac is INTEL late 2006... I hope that the caps are broken otherwise I cannot repair it.

The problem could be grafic card...

or any other...

by

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marco will be eternally grateful.
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