Help needed. New rig won't boot. How to diagnose problem?

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Big Red Knows

Honorable
Sep 1, 2013
7
0
10,510
Hello,

This is my first build. PSU finally turned up today so I built the system. Doesn't seem to work at all.

Components are as follows.

board: p9x79 pro
CPU: 3930k
GPU: gtx680 (MSI Twin Frozr)
RAM: 32gb (4x8gb) Gskill Ripjaw Z 1866
PSU: Corsair HX750w 80+ Gold
Boot disc:512gb Vertex 4 SSD
Optical disc:Pioneer BDR 208BDK
CPU cooler: Coolermaster Hyper 212 Evo
case:Define R4

Problem: I turn on the power and the onboard LED's for power and reset light up red and green respectively. When I press the power button everything twitches (fans, GPU fans, etc, before cutting out. Power lights remain on. There is no ram light at all. CPU LED flashes once after I press the power button.

So far I have taken out everything bar ram, CPU and cooler - no joy. The RAM is advertised as "ultimate quad channel memory for intel X79 systems". So I assume it is compatible. I've tried it with one stick, etc. No difference.

I don't have a speaker to listen to the motherboard output, I suppose I should go buy one. Does anybody have any other suggestions?

I thought it might be the PSU, it's second hand and when it arrived it turned out to have an (undisclosed) European plug that I've had to feed into an adaptor. Could this cause any problems?
 
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Big Red Knows

Honorable
Sep 1, 2013
7
0
10,510
TYhanks for the advice.

Yeah. It's now sat outside the case but with the same sort of problems. I noticed (no idea why I hadn't before) that the person I bought it off had put an extension onto the CPU power cable, so I took it off and plugged in the original lead. Now instead of the CPU light flashing, all lights (CPU, RAM, VGA) flash once after pressing the power button.

I will do as you say and buy a case speaker tomorrow. I'm also going to see if I can get my hands on a proven to work power supply. I have a feeling I may have bought a lemon.
 
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Big Red Knows

Honorable
Sep 1, 2013
7
0
10,510
Hi.

Was unfortunately called away on business.

I got a new PSU and that certainly was one of the problems, but not the only one. Now all the fans work (including graphics card and CPU cooler) but the CPU LED stays lit and the board still fails to post. I now have a case speaker but no sound emits. Just before the CPU LED lights the board 'clicks' and all lights blink once very quickly.

I have stripped the board back down to 1 strip of RAM, CPU and cooler all plugged in outside of the case. No joy.

I have checked the CPU pins, none seem bent. There is no obvious problem with the CPU (thermal paste interference etc). Am a bit grumpy now.
 
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