PC won't boot - no beep, no video

Hardware Hub Build a PC
1

This is my first build. It has been working fine since january 2013.

Yesterday it suddently turned off while i was playing Max Payne 3 and when I tried to turn it back on, the internal speaker would remain silent, the fans would spin for about 1-15 seconds (sometimes it would turn off in less than a second, it varies a lot), then the PSU would turn off.

If I DON'T switch Off the PSU, wait for the mobo LEDs to turn off, and switch the PSU back On, then litteraly nothing happens when I try to power the PC.

I've reseated everything, tried to boot just with the CPU and the heatsink, but it doesn't even complain about the absence of RAM (i believe the internal speaker should have beeped repeatedly?).

What can i do to find out where the problem is?

Here are the components:

PSU : Corsair HX 850

Mobo : Asus P8Z77-V LK

CPU : i7 3770k with a CM Hyper 612

GPU : XFX 7970 Black Edition with Double Dissipation (this cooler sucks, temps are terrible)

RAM : 2x 4GB 1600MHz from Markvision

2

clear the cmos by removing the battery for 10 seconds or if there is a reset switch or jumper use that

3

Tried removing the battery, but still can't boot.

4

Any other ideas?

Does the green led on the mobo indicate that the PSU is working properly?

5

i´m affraid of a dead mobo, or maybe a faulty psu but HX850 is a great psu, cannot imagin that.

 

6

I'm afraid it sounds like a dead Mobo/bricked BIOS. If you have a board with some form of BIOS flash back try that.

7

I did try resetting the bios if that's what you mean.

8

I just noticed that the PSU fan turns off immediatly while the CPU and GPU coolers keep spining for 3-5 seconds. Does that mean that the PSU is what's causing the problem. I really hope it's not the mobo, it would be hard to replace it.

9

My bad, your mobo doesn't support BIOS flashback. Looks like your board is poo. RMA it if you can.

10

You know when it "turned off" in the middle of playing a game. Was there any audible sound, like a 'pop'?

If the PSU was gone, it would likely not even supply even a trickle to attempt booting. Also when PSUs do go, they unfortunatley sometimes take other components with them.

If you have another PSU or access to one, test it with your system.