Other PC fan spins for one second and stops - No bootup

Hi People,

I had to come to u guys. U always are helping every one so i hope u help me too.

I have a pc the does PC Fan Spins For One Second And Stops.

Now I read something’s on the internet.

And I have now removed all hardware and unplugged all components.

And it boot all ok but as soon I connect anything like hard drive or gpu or dvd it just does the same one second spin.

What I am missing?

I very grateful for any help u can give me.

I have an m2n sli deluxe and an amd 78XX be

PSU is a cheap 650w one.

 

Buy a good one, then come back if it still doesn't work.

 

Agreed it defiantly sounds like the PSU

 

hi guys

i have bought this one

http://www.play.com/PC/PCs/4-/10136881/CiT-650U-650W-PSU-Power-Supply-Unit-Gold/Product.html

because i need also the 20 pins to test another comp with probs LOL!!!

 

Could be a short. Check the posts the motherboard is sitting on in the case, are they all the same height an in the right places?

Can you assemble all the components outside the case to see if it works?

 

Nooo...not a CiT PSU! I heard nightmares of users having it killing off their board and CPU...

 

I said buy a GOOD one! Lol. You just wasted 28 pounds.

Also, good PSUs come with a 24-pin cable that you can take apart and use it as a 20 pin.

 

this is more for the old comp amd 2600

but serve for me to run test on this machine like u said!

i was looking more into buying this one

http://www.novatech.co.uk/novatech/prods/components/powersupplies/Corsair/CMPSU-400CXUK.html

but only when i think all is ok mate.

times are hard got to trie and save money

is this one better ? all together is 35.33 not a bad price?

and could i run this card with it?

http://www.scan.co.uk/products/1gb-...shader-1700mhz-336cores-2xdl-dvi-i-1xminihdmi

just dont kill a guy because off a PSU... ok!!!

 

Why is "cheesecake" inserted into that last URL?

 

Word filter win/fail

 

sounds similar to a problem i had - cpu cooler fan wouldn't spin, though fans directly connected to psu and psu fan itself would. Mobo board power light came on but nothing else would start.

PSU currently (subject to courier depot not having lost it - in process of checking that...) with BeQuiet! for warranty testing...

It can happen to supposedly good PSUs too.

 

Honestly it sounds you like are having a boot failure more than a bad PSU.

Boot failures can be caused by.
1. Unstable overclock.
2. Unstable memory.
3. Short circuits.
4. Loose connections between memory or other add-in cards.

Try checking connections and resetting CMOS before buying stuff.
You can reset the CMOS but reading the manual instructions or the for sure way is just pop the motherboard battery out for 30 seconds.

 

I've done that on mine Waffle, and tested it out of the case. Starts up fine with another psu...

 

But he needs a reliable PSU anyways so we might aswell get that out of the way.

@OP Yes, the CX-400 is an excellent power supply, get it while you can, it's discontinued nowadays.

 

Have you put the RAM back in?

It sounds too daft to be true but I rebuilt my machine and wondered why it would only run for a second before powering down, only to realise I had left the RAM out. DOH!!

 

Happened to me on my old amd 3700 system, the el-cheepo case somehow warped my motherboard so the gpu wouldn't sit properly. When it wouldn't sit properly it would start, fans spin up for roughly 1-3 seconds than turn off. After taking the entire pc apart and installing on a box I noticed that the gpu wasn't sitting in properly. Bit of man-handling and pushing to try and flatten the motherboard and it worked just fine. Make sure everything is seated properly in their slots / all connections are proper.