Computer turning itself back on

[Epicwhale]

I've recently installed a new PSU (I think it was a corsair 800w) into my brothers computer and it boots up fine and runs perfectly, that is until it needs to be turned off.

 

After it has shut down it waits like 5-10 seconds then boots itself back up and there is like a slight zap sound every time this happens.

 

Is this a faulty PSU?

[Guest]

May be - just check your BIOS settings to make sure that WOL isn't enabled; I had that issue.

[KayTees]

I've recently installed a new PSU (I think it was a corsair 800w) into my brothers computer and it boots up fine and runs perfectly, that is until it needs to be turned off.

 

When it shuts down it waits like 5-10 seconds then boots itself back up and there is like a slight zap sound every time this happens.

 

Is this a faulty PSU?

Maybe you switched the Reset plug and the PWR around and didn't notice :3

[Epicwhale]

May be - just check your BIOS settings to make sure that WOL isn't enabled; I had that issue.

 

It's not enabled.

 

Maybe you switched the Reset plug and the PWR around and didn't notice :3

 

No I just checked and they're in the right place.

[trem77]

My PC does that because of a shared directory, another PC tries read shared networks and wakes up the PC.

Try to power off without the network cable (just to see what happens)

Also can be the usb waking up the PC, like mouse, keyboard etc.

[legendnb]

ok i may know the answer to this. 

in the bios, change the setting in power/after power failure/boot settings (gotta go find yourself, diff bios diff stuff)

Power on/Last state/power off

change to power off to ensure it stays shut.

[TheGeekster]

If there's a slight zap, could be the power supply shorting on something?

 

If you've still got the old PSU, try fitting that again and seeing if it'll shut down and stay down? If so, I'd say it's pretty much a given it's the PSU

[dragoon20005]

I've recently installed a new PSU (I think it was a corsair 800w) into my brothers computer and it boots up fine and runs perfectly, that is until it needs to be turned off.

 

After it has shut down it waits like 5-10 seconds then boots itself back up and there is like a slight zap sound every time this happens.

 

Is this a faulty PSU?

if you replaced the PSU and this happens

 

it most likely you didnt install the PSU properly

 

check all your connections are fully in