New build comp worked for a week, then died

March 12, 2011 at 21:53:00
Specs: Windows 7, 4 Gigs
I built a new rig one week ago. It worked fantastic since then,. Shut it down last night after it appeared to go into sleep mode, but I couldn't get out of it and just manually shut down.

This morning I wake up, push "power" and nothing. No response whatsoever. No fans, no recognition at all by the machine. The green LED light on the mobo is on.

I have an Ultra PSU and thought perhaps it was the culprit. Bought a Corsair, installed it, and again nothing when I press power.

Completely at a loss.

Processor: Phenom 2 965
GPU: 5870
Mobo: Asus M4A79XTD Evo
PSU: Ultra 650w LS
Haven't even touched any overclocking.

I beg you, please help.

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March 12, 2011 at 23:12:01
"Shut it down last night after it appeared to go into sleep mode"

Since you have tried a replacement powersupply I think we can safely presume that is not your problem.

That only leaves Motherboard, CPU or a plug-in device. Disconnect your drives. Take out all the ram and the graphics card. Try to boot. Do you get any fans spinning? Any BIOS beeps to indicate a ram or graphics error? What does the motherboard manual say about graphics configuration? Can you try the card in the other PCIe slot?
Try with only one stick of RAM. If the board remains non-responsive then you have either a failed CPU or failed motherboard.

Goin' Fishin' (Some day)

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March 12, 2011 at 23:21:35
Thank you very much for your reply. I will do this tomorrow as I'm going to bed now.

Just out of curiosity, if it comes down to it, how can I tell the difference between failed CPU or mobo?

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March 12, 2011 at 23:31:43
There's the rub. You need a known good motherboard in which to test the CPU. not everyone has a spare compatible system laying around to swap in/out test components.

Goin' Fishin' (Some day)

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Related Solutions

March 12, 2011 at 23:37:39
My curiosity got the best of me, and I tried it. Took out the GPU, RAM, and unplugged the HDD and optical drive.

Tried the power and no sound at all. No beep, no fans, no response.

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March 13, 2011 at 03:46:34
I recommend you bench test the board before replacing any parts.

With the motherboard outside the case connect ONLY the following: Power supply, CPU/w HS/fan, 1 stick of RAM, graphics card/chip, monitor, keyboard. NO additional hardware and no case to board wiring. Start the system by momentarily shorting the two power pins with a screwdriver. Ram should be in the #1 slot.

While the board is out of the case, verify you have not installed standoffs where they don't belong and have them under every screw hole. Board should POST to hard drive error.

If no beep at start up remove the RAM and see if beep error is heard.

I suggest you clear the CMOS before performing this procedure.

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March 13, 2011 at 10:47:50
Okay, I did that. -edit-

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March 13, 2011 at 10:50:29
Scratch that last post. The BIOS started! Whoopee. CPU and GPU fans are working.

It says "press 1 to recover BIOS settings."

What do I do now? I'm pretty happy at least that it's not the mobo or cpu (??? I hope). Was it the clearing of the CMOS that did it, or perhaps directly starting the machine with a screwdriver instead of the front-panel connector? Can't believe it was faulty wiring on my part as I've just repeated what I've done many times before and the BIOS is working.

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March 13, 2011 at 12:55:39
Put it all back together and it works now. No idea what the problem was. In my research, I found some people who had to constantly reset their CMOS after having issues like mine. Hope that's not the case for me.

Anyway, thank you OtheHill and Richard59 for all your help. :)

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March 13, 2011 at 13:38:11
No problem.

You need to boot into the BIOS and reset some values. The data and time for sure and maybe the boot order. You may also want to look at the settings for the processor and RAM. Defaults may not be the best settings. Be sure to save when exiting the BIOS screens.

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