Newly built PC randomly doesn't POST

I just built a new PC with these specs

AMD FX-8320 3.5GHz 8-Core Processor
ASRock 970 Extreme3 ATX AM3+ Motherboard
Corsair XMS3 8GB (2 x 4GB) DDR3-1600 Memory
Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
XFX Radeon HD 7850 1GB Video Card
NZXT Source 210 (Black) ATX Mid Tower Case
Corsair Enthusiast 650W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply
Lite-On iHAS124-04 DVD/CD Writer

I am having an issue where I press the power button, all the fans come on, LED's light up, and DVD drive comes on; but the computer gives absolutely no video output. No post, no chance to go into bios, nothing. The monitor remains in power-save mode as if the computer was still off.

During a normal startup, my keyboard num/caps/scroll lock lights will all flash once. When it doesn't start up correctly, none of these lights flash;however, i can press the lock buttons to make them come on manually. The mouse also does not light up.

I have not yet reset the motherboard incase of problems with grounding or anything of the such. I did remount the CPU heatsink/fan as well as the CPU itself. I didn't notice any bent pins or any thermal grease on the pins. I also reinserted the RAM and assure that it is in the correct dual channel configuration.

Additionally, I have downloaded memtest and have run two passes of it, discovering 0 errors. I ran it while in windows (thus it probably couldn't cover ALL memory).

What could be wrong here? Hardware issue? Is one of my RAM sticks malfunctioning? Bad motherboard? Damaged capacitor?
Please help me. Thanks.
4 answers Last reply
More about newly built randomly post
  1. Will most likely have something to do with your GPU.

    >Make sure you GPU is connected to the monitor via a cable and make sure the 6 +2 pin connector is connected to the GPU socket.
    >See whether your monitor is on the correct signal/source, for example you monitor could be set to DVI but the cable you are using is VGA.
    >Unplug all unnecessary USB connectors (e.g. webcam, USB stick etc.)
    >If you have two identical back ports on the back of your GPU try putting the cable in the other port to see whether it is a digital signal or for adapters only.
  2. The problem I am having is randomly, though. It may start up correctly 10 times in a row, and then fail to start 4-5 or more times in a row. I checked my monitor and it is set to digital output. I am using DVI. The 6 pin connector is plugged in; the extra 2-pin piece hangs there/there is only one power connection.
  3. anyone? I still haven't solved this problem...and it's very annoying knowing that something isn't working right. I need to know what's going wrong so that I can try to get this fixed...and if necessary, contact Newegg to do my first RMA.
  4. anybody.,..? feeling like RMA'ing the whole machine at this point.
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