Failure to boot following PSU replacement

Imacflier

Distinguished
Jan 19, 2014
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Afternoon, All,

Well I replaced my Corsair AX 750 with a Corsair RM 750X trying to fix a no power problem.

I now have power, but no boot!

The hardware:

MB: GA-Z97X-UD5H Rev 1.0
CPU: I5-4570K (not overclocked)
Memory: 2 sticks, 8GB ADATA XPG (from Qualified Vendor/Memory List)
GPU: EVGA GTX1060 6GB
Storage: 250 GB Samsung SSD
5 x 3TB Seagate HDD
Background:

The system is a few years old and has been generally trouble free. In the past year or so, memory got a bit flaky and I have been using one stick of memory with no memory errors. This is with either of the two sticks installed and in any slot.

The Symptoms:

Fans run, MB lights illuminate, Continuous Short beeps, then boot loops.

Error code: 20

No video either GPU or on-board.

Done so far:

Verified cabling connections; reset bios; switched memory sticks...and tried both together.

Speculation:

since I once had flaky memory errors, perhaps I have a memory controller failure. I THINK that would be a cpu failure??

What do I do next? I do have an I5-4690K that I could swap in, but would REALLY avoid this if possible.

SO HELP!

TIA,
Larry


 


Old PSU has failed...cabling checked and rechecked...since the cabling had to all be replaced with the cables supplied with the RM750x
 


How does one test the cpu or motherboard other than by replacement?

The New PSU passes on a PSU tester....though that does not test under load.

If no one has another suggestion I will swap in an I5-4690k what was planned for an itx system.

Larry