PC wont power on

[Retrox]

Hello all.

I have recently built my new PC. Put it all together, and it wont turn on. I returned the M/B, CPU, GFCX Card and PSU to the company i got it from, they tested it and said it was the PSU, the rest is fine, and they could get it to post. So i travelled back from Stoke to Somerset, put it all together, and nothing. I then rebuilt it out of the case on the M/B box, plugged the PSU in, GFX Card, CPU + HS&F and one stick of memory. Still nothing, i even tried using a key on the two Power Switch pins to see if it was the switch on the case. (Yes i have checked i have the main ATX Power cable AND the 4 pin one)

Here is my spec

Asus A8V Deluxe Wireless
AMD Winchester 64 Bit 3000+
Kingston DDR Ram (1x 512)
XFX GeForce GT6600 128m
Tagan 480W PSU

I would really apreciate your help/advice. Thank you.

[mike_w]

When you say it doesn't turn on, you mean that absolutely nothing happens? (No beeps, no fans spinning up).

[Retrox]

Nope, nothing, nothing at all. No a single bleep or fan rotation

[Steve]

Plug a hard drive or something into the PSU and nothing else (some PSU's don't like having zero load on them.) Now short the green wire on the ATX connector with a black wire - paper clips are good for this. Does the PSU turn on?

Also try another kettle lead... they do have fuses in them and one might have gone.

[yamangman]

Replace the fuse in your plug?

[Retrox]

Now short the green wire on the ATX connector with a black wire

- Eh? Which green wire, and which black one?

Another thing worth noting, the Green LED on the motherboard IS on. I got a new PS Cable with the new PSU.

[Steve]

I'm talking of the green wire on the 20pin ATX connector. Find out which pin it goes to on the connector, and short that with any of the black ones (they are all common.)

However, the LED is on, so you at least have 5 volt standby voltage I would think.

[Retrox]

all of the cables are yellow, red and black on the 20pin atx connector.

[Steve]

Scrap that plan then.

Try another PSU if you have one handy.

[Retrox]

I only have one PSU, the only other one is a 300W
I went all the way on the train yesterday to the company in stoke (overclockers) with all the bits from taunton in somerset they said they tested them ALL and found only the PSU to be faulty, which they then replaced, tested and confirmed working. I called them today and they were basically saying i must be doing something wrong. I have built many computers in the past for where i used to work, so i know i have done what i normally would. the only difference is the fact that im pluigging in an extra ATX cable which is labelled E on the PSU. Is this right? I can fit in two different ways, (there isn't a clip to see which is the proper way)

[Retrox]

any more ideas? I am really Stuck and desperatly need this pc working. If i had spare parts to try i would be able to find the problem, unfortunatly i dont.

[Steve]

Try the 300w one - not to use permenantly, but just to see if you can get the motherboard to POST.

[Mblaster]

Maybe it's a problem with the motherboard BIOS not being compatible with the Winchester CPU, but overclockers.co.uk said they got it to post, so it's pretty unlikely. You live in Taunton? Closest person to me that i've seen on the net (about 20 min drive)

[Steve]

Mblaster the fan doesn't even spin - that can't be a BIOS issue.

[Retrox]

OK, i will try that. I guess it could either be the PSU or the M/Board, am i right?

[Steve]

Probably.

If you're still stuck, try JUST the motherboard with a fan plugged into it or something. No CPU, nothing else. If still no luck, and you're sure the PSU is OK, then it must be motherboard IMHO.