Probelm with powering up pc

Jimmy1983

Jimmy1983

Jimmy1983

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Joined
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Portsmouth
Ive just installed the noctua nh-u12p to replce my stock fan, and I done so without disconecting all off the cables, I only disconnected a few including the power ones. Now after plugging evrything back to how I think it was, the PC isnt turning on. The keyboard lights flash when I hit the power button on the PC, and one fan spins slightly but thats it.

Iam sure I must have done something wrong, but cant figure it out. I knew I should have taken some photos before hand, so see where the cables went :(
 
no didn't plug in the 4 pin connecter, I've not got a connection for it on my board. I don't think I unplugged it anyway.

Yer I plugged the noctuas fan which is 3 pin into the 4 pin header on the board, and tried powering the of up without it aswell.
 
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Make sure that the 20/24 pin main connector is plugged in all the way. These can be a pig to push in sometimes and you may think that it is all the way in when it is'nt. The same goes with the 4/8 pin auxilary lead. Double check everything else in case you nudged something and it is'nt seated correctly.
 
Like stated, check cables, such as the 4 / 8 pin cable (normally situated near the Cpu socket), and check the 20/24 pin cable as stated as well...even if by checking you have to unplug the thing then put it back in, so be it.

It sounds more of a shorting issues to be honest...

I might have to be really annoying, and see if you are willing to re-seat the cpu. When you put it back in, the notches where all alligned correctly yes? Even so, I've seen many a build in my time where people have put the cpu in so its basically at some odd angle, and somehow put a heatsink on top of it!

Worth a shot either way.
 
Thanks guys I didn't actually take the CPU out I just took the stock fan off and put the noctua on and re-applied some thermal paste. I done most off this while some off the pc was connected like the hdds and DVD rom etc kinda done it in my case. Everything was turned off, obversly. Well I was going to put the old fan back on to see if I can atleast power it upagain.

I didn't hear any pop sounds or see any smoke when if tried powering it up, just hope I've not destroyed anything :(
 
You could try removing the new heatsink, and putting the old one on if it isn't too much trouble...

well, infact you don't even have to put it on, just rest it on top so it has some contact atleast, just to see if it boots up.

Don't leave it on for like and hour or whatever cause it will naturally get a lot hotter and quicker than usual.
 
Delvis said:
You could try removing the new heatsink, and putting the old one on if it isn't too much trouble...

well, infact you don't even have to put it on, just rest it on top so it has some contact atleast, just to see if it boots up.

Don't leave it on for like and hour or whatever cause it will naturally get a lot hotter and quicker than usual.
Click to expand...

What and just leave the old thermal paste on for the time being? Yeah will give it ago, will only leave it on for 5-10 to check it runs ok.
 
Right I put the old stock fan on and still nothing.

One thing I have noticed it tho ifI plug the main power plug into the rear off the pc(kettle plug) then power it up all the fans spin for about 2-3 seconds. Now if I try again, the fans dont spin. But if I disconnect the kettle plug again, then plug it back in, the fans spin. Tried with the HDD's connected and those fans dont spin up. Tried with the gfx card in and out and connected to my monitor-still nothing.

Only thing ive not tried is screwing all off the motherboard screws back, but I doubt this will make a differance.

A friend had a look tonight and maybe thinks its the PSU, but my father thinks otherwise as the fans start to spin up. Hhhhhhhhhhhhmmmmmmmmmmmmm.

They are great when they work, running out off ideas now :(
 
if you remove the memory do you get any beeps? strip down to board, proc and psu. if you are still getting the problem then replace the psu, do you have another system you can try the psu in?
 
Will try the ram idea, thanks. Not thought off that one. Ere yeah I do have another PC but I think it takes a differant PSU.

If it is the PSU, ive still got the box and recipt but its past 12months now. But the box says it has a 5 year warrenty, I assume I couldnt take it back to the shop where I got it from for a replacement? If it is that?

From what Ive said do you think it could be the motherboard? Ive not seen any smoke, dodgy noises from anything to say it has blown.
 
id imagine you would need to contact the manufacturer of the psu as the warranty would be with them. Have you checked that that cabling for the power button is ok? You can test this by removing the cable and shorting the pins using a ballpoint pen. this will rule out the power button as causing the fault.

But from the sound of it i would say its the psu. Can you short out the green wire of the atx connector with any of the black grounds. If the fan doesnt spin up then the psu is faulty.

see here for a guide on how to do this.

http://aphnetworks.com/tutorials/psu_paperclip_trick
 
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Thanks NinjaPaul, will try that later on tonight. It seems strange that something like this would go wrong, after all, all I did was try to change the CPU fan!

Would I be ok to use a multi-meter on the main power connecters, then turn the PSU on and see if I get any voltage readings?

Wouldmt the PSU go pop if it was that, the fan on that spin for about 2-3 seconds each time I try to pwer it up.
 
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NinjaPaul said:
id imagine you would need to contact the manufacturer of the psu as the warranty would be with them. Have you checked that that cabling for the power button is ok? You can test this by removing the cable and shorting the pins using a ballpoint pen. this will rule out the power button as causing the fault.

But from the sound of it i would say its the psu. Can you short out the green wire of the atx connector with any of the black grounds. If the fan doesnt spin up then the psu is faulty.

see here for a guide on how to do this.

http://aphnetworks.com/tutorials/psu_paperclip_trick
Click to expand...

I shorted out the power button, and that just span the fans again for a few seconds.

I read that guide, thanks. So after ive connected the paper clip, did you want me to power the PSU up? To check the PSU's fan spins?
 
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NinjaPaul said:
if you remove the memory do you get any beeps? strip down to board, proc and psu. if you are still getting the problem then replace the psu, do you have another system you can try the psu in?
Click to expand...

Tried removing the ram with just the PSU motherboard and CPU connected, and I dont get anything.
 
Fitted new board with old componets including a noctua to replace the stock heatsink. If I connect both HDD's the fans spin for a few second, tried smaller HDD in fathers PC as I wanted to get some data off it anyway, and his PC doesnt boot with it. Tried it in mine without the other HDD and still nothing. Connected my other HDD(storage one) and bingo, PC boots up?!

So a dodgy HDD is too blame, funny that my old gigabyte board didnt boot without any HDD's tho. Hhhmmmmmmm. Any idea what I can do about the dodgy HDD, has anyone had a problem like mine when you cant boot from a HDD? It didnt make any clicking noises before when it was working fine.
 
Funny stuff.
But yeh it can happen, anything can make PC not boot, the first thing u should do is try to power it without any hdd/cd at all.

I would say the board is bit dodgy as well. If you can get an IDE/SATA to USB converter try to plug your HDD with that and see if it works. If not then I guess u will just have to send it for repair.
 
The new board works fine mate, got everything plugged in and running bar the dodgy HDD. But with all the parts on my old motherboard, it didnt work so I wonder if the dodgy HDD screwed up my motherboard somehow?!

But there is defo something wrong with the HDD as it doesnt work in mine and my fathers PC.
 
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