PC Shutdown, now boots on only for split second

breitinger · May 28, 2015

Build Set-up
Case- Ultra Defender II
Motherboard- Asus Z97 Sabertooth Mark II
CPU- Intel i5 4690k
Graphics Card- Sapphire Radeon Dual-X 280x
PSU - ULTRA LSP 750
RAM- 2: Kingston Fury HyperX 4GB, 1: Kingston Fury HyperX 8GB. 1866 Mhz
---- 4 fans and a Corsair H55 liquid cooling unit

Alright, so, I have been using this PC build since November, working perfectly fine. The other day, whilst playing CS:GO (as one does), my PC shuts down right in the middle of a competitive match. I thought, ehhh, no big deal probably got a little hot or something. Later when I went to turn back on it did the 'ol turn on for split second then right off. Fans, lights, etc. No beeps though (of course). Now I know this is a shitty brand for a PSU, but it's been running fine? Any ideas on what happened? How to fix?
I have tried taking out all RAM but one and booting, but still no luck. Checked all connections, and made sure the switch for the PSU was set to the correct voltage.
PLEASE HELP! :??:

Shaun o · May 28, 2015

Take the cord out of the back of the tower where it connects to the Psu.
If the Psu has a rocker switch on the unit turn it to the off position.

Now turn off the plug that the Psu power cable is connected to at the wall socket.
Count to ten.

Turn it back on.
plug the other power cable end back into the Psu.
Turn the rocker switch on the PSU back to normal power mode.
Press your power button on the case.

If your Psu is of a good quality and known brand it will be one of the protection circuits of the PSU has been tripped.
The method above clears and resets all protection circuits of a Psu.
When the system powers up for a split second then turn straight off again it is often to do with the protection circuits need re setting.
Spikes in voltage from the mains can cause this, the circuit to kick in.
Any power disruption will cause it.
Give it a go let us know if it fixed the problem ok.

breitinger · May 28, 2015

I did this and the same thing happens. Just a quick burst of energy. Thanks for the help though!

breitinger · May 29, 2015

bump.

breitinger · May 29, 2015

Shaun o :

Take the cord out of the back of the tower where it connects to the Psu.
If the Psu has a rocker switch on the unit turn it to the off position.

Now turn off the plug that the Psu power cable is connected to at the wall socket.
Count to ten.

Turn it back on.
plug the other power cable end back into the Psu.
Turn the rocker switch on the PSU back to normal power mode.
Press your power button on the case.

If your Psu is of a good quality and known brand it will be one of the protection circuits of the PSU has been tripped.
The method above clears and resets all protection circuits of a Psu.
When the system powers up for a split second then turn straight off again it is often to do with the protection circuits need re setting.
Spikes in voltage from the mains can cause this, the circuit to kick in.
Any power disruption will cause it.
Give it a go let us know if it fixed the problem ok.

Thanks for helping, any more suggestions?

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PC Shutdown, now boots on only for split second

breitinger

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Shaun o

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