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Z97 Extreme4 Board Diagnostic

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Joined: 18 Jun 2022
Location: Reedley, CA
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    Posted: 18 Jun 2022 at 7:51am
I have a Z97 Extreme4 Motherboard with and Intel Core-I7 4790K that is failing to clear POST.

We've taken it out of the case and stripped it down to nothing but the CPU, but still don't get any beep codes.
We've tried two power supplies. The first one will boot loop after starting up for a second or two and wiggling the fans. The other PSU will produce an audible click and occasionally cause the BIOS_A_LED and BIOS_B_LED to flash for a second before turning off.

All pads on the CPU appear to be clear of anything that would cause a short, and I didn't see anything on the board side even before I did a safety pass with a can of air.

Any recommendations about further diagnostic options are hugely appreciated as I don't have another CPU spare to test further.
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