CPU not booting, motherboard LEDs and fans working

April 21, 2012 at 11:29:09
Specs: Windows 7, i5 2500k/ 8GB
So, to give some background, this is my first build, and it has been assembled and working for 4 months now with no problems. I was able to identify the original motherboard as defective the first time I was building it, and the new one has never given me any problems.

My parts are an i5 2500k, a Gigabyte 768 mobo, a Seasonic 750x PSU, a Gigabyte 6850, and 8GB of GSKILL RAM. And I have an aftermarket heatsink as well. CPU is not overclocked.

Essentially, I was running it overnight to patch a game, and this morning when I came to wake it up the monitor wasn't showing anything. Turned it on and off again, "no signal", etc. I tried turning on my sound and restarting the computer, and I didn't get the bootup sound, so I'm guessing my CPU is not booting at all.

I have run it overnight before with no problems, and as stated, I have an aftermarket heatsink and it's not overclocked. I would be very surprised if it overheated.

Also, normally when I boot up, the motherboard LEDs start up for a second and then turn off. Now they're just staying on- not blinking, just staying on. I don't think it's the PSU either, as it has more than enough wattage, but a failure is always possible I suppose.

I have not taken it apart yet- I'd like to avoid that if possible- but if you have any advice I'm willing to take it. Hopefully, if I can't resolve it, I can at least find out which part is the issue.

Thank you very much for your help!

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April 21, 2012 at 21:42:20
There is not too much that you can do if you don't want to take the computer apart. You can unplug it from the wall, press and hold the power button for 5 seconds, plug it back in and try it.

Other than that you are going to have to open the computer and do some troubleshooting.

I would start removing all the ram and just trying one stick at a time.

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