New build not powering on at all. PSU not the issue.

crapmonster

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Apr 11, 2010
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18,510
Basically to start, I did a build for a family member based on one of the recent posted budget builds here with some swaps with hardware I already had laying around:

Intel Pentium G850 2.9 GHz
G.SKILL Value Series 4GB 240-Pin DDR3
COOLER MASTER eXtreme Power Plus 500W
ASRock H77 Pro4/MVP LGA 1155 Intel H77
Seagate Barracuda ST500DM002 500GB
XFX HD6870
Windows 7 Home OEM 64bit

I did the build a several weeks ago and for about 4-5 days ran flawlessly. Then one day I get a message saying it won't turn on. I go to check it out and check all obvious reasons (loose connections, shorts, bad cord, etc...) and don't come across anything. It appears no power is coming through at all. No lights or beeps from the mobo or fans spinning even momentarily.

Suspecting it was a bad PSU, I RMA'ed it and got a replacement today. Plugged it in and still nothing. I tried the jump test (from green to black) and it does turn on so PSU is definitely fine now.

Tried taking out out the videocard, clearing CMOs, disconnecting everything but ram and cpu, and still nothing.
 

crapmonster

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Apr 11, 2010
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18,510
Also to forgot to mention, I already went through the no POST checklist here and checked whether the power button itself was faulty by rerouting the wires to the reset button on the case instead.
 

clutchc

Titan
Ambassador
If breadboarding with a known-good PSU, RAM, CPU/Cooler, monitor using the on-die graphics only (remove gfx card) doesn't allow you to boot to BIOS or fails to even start, I would have to think the MB has failed. The CPU is far less likely to be the culprit.
 

crapmonster

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Apr 11, 2010
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18,510
I suspected as much but wanted to try every possibility before RMAing the MB since I haven't heard the greatest things about ASRock support. In retrospect I should have taken the bad reviews for this particular board as a sign, but I've bought several of their board before with no issues so took the chance.

Either way, Ill throw them an email but if anyone has any ideas to share still, please do.