New build, no POST

ChrisD.

ChrisD.

ChrisD.

Man of Honour
Joined
20 Sep 2006
Posts
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Just upgraded my old Opty 175, A8N32-SLI and Ram to a E4300, P5N-E SLI and 2 GB 5400 Balistix RAM.

Rest of spec is:

ET850 PSU
7900 GTX
X-Fi Fatal1ty
2 X WD Raptor 36
1 X WD Caviar 250 GB

I put everything in, the only trounble was the NH-U12F in which I cought the motherboard slightly with a screwdriver. There is a small mark anout 3/4 " long on the surface, but whether it's cut the tracks or not I'm unsure. It's not near any somponants, but I can see small tracks on the board.

With my ET850 PSU, it powers on then down about 2 secs later, and I can do this as many times as I want and no change. I had this on the previous board but one day it decided to work and I never had a problem since, I also upgraded the BIOS on the old board.

If I put in my mates Hiper M 580 it powers up and stays on, then nothing. Just power and no post. Only time I can get it to beep is if I remove both sticks of RAM and the GFX card then I get one long followed by two short beeps which is VGA error.

Decided to try my PSU again and now it doesn't power up, instead it switches the light on the back of the PSU to red and stays like that untill you disconnect AC for about 10-15 secs.

What could be the problem? RMA the PSU and motherboard?

Also, I heard a dogy buzzing noise from the PSU for a split second when I moved the swith from on to off.
 
Last edited:
Anyone? I really want to get this rig working as it's my only PC :confused:

I've no idea what to do. The red light on the PSU has gone now and it's doing what it did in the first place.
 
Start again.

Reset the CMOS.
Take the CPU out, inspect it and then replace it.
Turn the PC on with just the CPU & heatsink and no video card or ram.
Check out the beeps.
Then try it with just the video card but no ram.
Check out the beeps again.
Then, if the beeps indicate no memory, try it again with memory.

Report back with your findings.
 
OK tried the PSU on another board I have lying about - a P5N32-SLI with nothing else pluged in (just how my new board is right now and power isn't staying on) and it stays on. Removed the CPU from new board leaving nothing in just like the check I did with the other one and the powertripping issue is back. Looks like that mar I made on the motherboard could be the issue? Or would my new board be fine and it's something else? I've trieed loads of things, I removed the mobo from the case, and the same.
 
ns400r said:
Start again.

Reset the CMOS.
Take the CPU out, inspect it and then replace it.
Turn the PC on with just the CPU & heatsink and no video card or ram.
Check out the beeps.
Then try it with just the video card but no ram.
Check out the beeps again.
Then, if the beeps indicate no memory, try it again with memory.

Report back with your findings.
Click to expand...

Thanks mate.

Turn the PC on with just the CPU & heatsink and no video card or ram.
Check out the beeps.
Click to expand...

PC powers on, almost immediately a click (almost a clunk, if I put my fingers on the top of the PSU I can feel a relay or similar moving) comes from the PSU and there is no power.

Then try it with just the video card but no ram.
Check out the beeps again.
Click to expand...

Same.

Then, if the beeps indicate no memory, try it again with memory.
Click to expand...

No beeps, with or without memory. This is with my ET850 PSU that powered my old rig up fine and still does as the majority is now in my mates computer which I'm iusing now. If I put the ET850 on it it powers fine. If I use his new Hyper on mine I get power but no beeps, unles it's wha happened in my OP in which I get the VGA beeps.
 
**Have at least 1 hard drive connected while you test**

Try again with 1 hard drive, the motherboard and the CPU/heatsink.
 
Tried and same. It's as if the PSU is cutting out as soon as I hit the power button. PSU works on other PC.

Looked at all cables and no nicks or cuts etc.
 
I would hazard a guess at either faulty CPU or motherboard but will stick my neck out and say that the CPU isn't inserted correctly in its socket even if it looks like it is. Hard to explain but there ya go.
 
I've checked it three times now mate. I was surprised to see the C2D chip not having long pins like the AMD 939 chips... Anyway, I don't want to check the CPU again as the Noctua HSF is a pain in the bum to remove and put back on!

The CPU can only go in one way round anyway :s As soon as I set it down it sits firm and then it gets locked into place by the bracket on the mobo.
 
Just stuck a voltmeter on every single power output and cross referenced the results with the PSU manual and not one abnormality. EG on one of the 12V rails, when I power on, my meter reads 11.99V then a split second later just after the clunk from the PSU it dies and goes to zero.
 
AndyOcUK said:
Check you've not bent any pins in the socket mate ;)
Click to expand...

They all look fine mate, nothing appears out of the ordinary on the socket or CPU. Besides, the PSU cuts out even when the CPU isn't installed which it doesn't do on the other board I have lying about when there's no CPU in it, it just powers up and obviously does nothing more.

I think I'll RMA the motherboard tomorrow.
 
Well if this "nick" is three quarters of an inch long, it's pretty likely you've knackered the motherboard.

RMA time. :)
 
MilanoChris said:
It's only a slight surface mark, I thought the main tracks were inside the board not on the actual surface?
Click to expand...

Well back in the Socket A days I had an MSI board which I bought new, took home, and rigged up. A couple of days later I was replacing the heatsink, slipped and made a very small 2-3mm mark on the board, nowhere near any tracks or anything.

Board was dead.
 
Tute said:
Well back in the Socket A days I had an MSI board which I bought new, took home, and rigged up. A couple of days later I was replacing the heatsink, slipped and made a very small 2-3mm mark on the board, nowhere near any tracks or anything.

Board was dead.
Click to expand...

Ah cool, I'll get it sent back.
 
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