LED 1 flickers with a clicking sound

My iMac G5 won't power up at all. I removed the back cover and plugged in the power cord. LED 1 flickers and there is a clicking sound that matches the flicker. Trying to power up by the internal power switch does nothing. Pushing the reset does nothing either. Any idea where the problem lies?

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My serial number is in the first range, W8452xxxxxx.

So, I will check the capacitors before looking for a power supply.

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This indicates a bad power supply. Before replacing it, examine the capacitors (cans) on the logic board for corrosion and/or swelling. See if your machine is in this list:

Serial Number ranges:

W8435xxxxxx – W8522xxxxxx

QP435xxxxxx – QP522xxxxxx

CK435xxxxxx – CK522xxxxxx

YD435xxxxxx – YD522xxxxxx

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