ASUS Sabertooth Z87 CPU won't power up

[DeanV]

First time post, but not first time build, but last build was a few years back.

ASUS Sabertooth Z87
Intel i7-3770K haswell
32 GB G.Skill DDR3 1866 / F3-14900CL-10Q-32GBZL
ASUS GTX 670
Cosair TX850M power supply
Cosair case
Samsung 256 MB SATA SSD
2 TB SATA HD
ASUS SATA blue-ray drive

System is not booting – the CPU and fans are not powering up.

When I turn the power supply power on, the motherboard standby power LED lights up and the LEDs on the GTX 670 light up, but when I hit the power-on button, nothing happens – no other LEDs light up and neither the CPU cooler FAN nor the case fans start.

I started with all components connected, and slowly started disconnecting everything one-by-one, but it made no difference. I currently have only the motherboard power, CPU power, the front panel items (power on, power reset, HDD LED, system power LED) and CPU and case fans connected, and have a single 8GB DDR3 installed, but still only the standby power LED and no other activity. No keyboard or mouse is currently connected and I also swapped the remaining 8GB memory module with other 8 GB modules. The Cosair power supply has a secondary/optional CPU power cable and I also attached and tried that but it also made no difference.

Any ideas on how to proceed appreciated.

 

[Mrross]

Hi I have had the same prob with Gryphon mb z87, worked booted up fine after fresh build then came back to find it powered off, then just spins fan for half sec. I did not have this prob when I first built the first build it lasted 6 months then I powered of while on sleep mobe and it would never boot again. I sent back after trying every thing suggested already in this blog. I'm now on my third mb and just had same prob after 20mins. So thats 6 months for first 2hours the second and 20 mins the third mb. Exactly same set up and the psu has been tested, brand new case,

I just think Mother board fault as they are old and now seen then for £20 overseas

Cheap parts give you farts,

Falty MB send back demand customer support.

People