Sabertooth Z77 Troubleshooting help.

[mattp92]

Hi have have built my own computer see specs below, recently i have encountered a problem where the system will randomly turn off for no apparent reason with no warning or shutdown screen. The system will then proceed to automatically restart. It then loads up the BIOS screen and sometimes will start windows, however, sometimes it will get suck in a loop where the BIOS screen loads cuts out and reloads the BIOS screen and the only way to stop this is to hold the power button for 5 seconds. I have attempted to fix the problem by doing the usual things clearing CMOS and updating the BIOS. I have also tried booting with out GFX card etc and just had one stick of ram and the cpu and the primary HDD. Just wanted too see if there is anything i can do before going through the hassle of contacting Asus. It is also worth nothing that this is a recent purchase of less than a month. Any help would be greatly appreciated.

Matt

Intel Core i5 3550 3.3GHz Socket 1155 6MB Cache

Asus SABERTOOTH Z77

Be Quiet Pure Power 630W Modular PSU

Kingston Hyper X 8GB 2133MHz DDR3 CL11 DIMM (Kit of 2) XMP Beast Series

EVGA GTX 660 FTW 2GB GDDR5 Dual DVI HDMI DisplayPort PCI-E Graphics Card

Samsung 840 SSD - Basic

Seagate 1TB 3.5" Barracuda SATA-III 6Gb/s Hard Drive - 7200RPM 32MB Cach

Samsung 24x DVD Writer SATA - Retail Box Version

Not sure if necessary but will include anyway

D-Link 200Mbps Powerline Adapter

Corsair Carbide 300R Case with Window

[killerx525]

Have you tried another power supply?

[Dave :)]

Have you checked to ensure that A) All your power connectors are correctly seated? Or B) That none of your motherboard stand offs are touching a part of the motherboard they shouldn't be which could cause a short.

[mattp92]

I have just tried another power supply no luck there. I'll try running the motherboard on a cardboard box that shouldn't cause any shorts.

[killerx525]

If that fails then you should RMA the motherboard.

[Chemical]

Have you checked your CPU temp in the BIOS? Maybe your Heatsink is not fully seated and its overheating. I would double check your heatsink, if that appears ok remove everything that isn't needed for to POST and boot and see if you can get past POST you can run also run Memtest from a USB to ensure your RAM is good. From there keep adding parts one by one until it starts to crash again.

Mobo's are a pain to troubleshoot unless you have a spare mobo or another system you can test all your components in.

[mattp92]

Doesn't look like i'm going to be able to fix it, fortunately it happened within 30 days of purchase so they should just swap it for a new one. Thanks for all your help chaps.

[killerx525]

Hope it all works out :)

[JAWs]

Another possibility is a flaky power switch. I've had this problem with my wife's case.