Completely unresponsive to mouse/keyboard

[Randybob01]

I've had a problem come up in the past month on a build I put together this summer.

Intel i7 3770, stock cooler
Gigabyte GA-Z77X-UD5H
Antec Earthwatts 650W PSU (old)
8 GB RAM - G.Skill F3-12800CL9D-8GBXL
WD Black 2 TB (WD2002FAEX)
PNY Geforce 9800 GT
Cooler Master CM690 case, standard 3x120mm fans that came with
Windows 7 64-bit/Linux Mint Maya 64-bit, KDE

All of a sudden, without warning, the system goes completely unresponsive. Mouse will not move, keyboard does nothing, not even ctrl+alt+del. Sometimes it doesn't happen for several hours, sometimes it happens within minutes of booting up. If I don't hold down the power button, it automatically does a hard shutdown. Last time it happened, I timed it, and it took about 20 minutes from the freeze to the power going off. I figured it was a Windows driver issue, but then it started happening in Linux, too. I then figured it must have been heat, but upon inspecting all of the fans - case fans, video card, CPU, power supply - they were all running. I figured it may have something to do with the disk, but chkdsk kept coming up clean and Data Lifeguard Diagnostic reported no errors from an Extended check (it also passed the SMART test according to DLDiag). I did memtest 86+ overnight, and after 6 + passes, no errors. The motherboard has a digital code display next to its power button, but it remained on A0, same as it is right now when it is running normally. Any idea what it could be here?

 

[Rakehellion]

Is it that your keyboard and mouse stop working or is the system crashing?

If the first option, what keyboard and mouse are you using? Maybe a USB device is drawing too much power and getting disabled. Have you tried unplugging and plugging it back in?

If the second option, then it's a hardware failure. Make sure your memory is properly seated and that your CPU is in place. Try swapping out memory modules to see if they're defective. Isolate components to see which may be at fault.

 

[Randybob01]

The system is crashing, as evidenced by its automatic hard shutdown 20 minutes (maybe less in some cases) after the freeze. Yes, both the keyboard and mouse are USB - it doesn't have any PS/2 ports.

 

[denis280]

Open CMD and type in chkdsk

 

[crashtech]

Few things off the top of my head:

Try a Live CD like Parted Magic and see if it freezes, if not the disk subsystem might be at fault.

Try removing the old video card and run on the integrated graphics.

Try a new PSU.

 

[Matt1970]

Is it that your keyboard and mouse stop working or is the system crashing?

If the first option, what keyboard and mouse are you using? Maybe a USB device is drawing too much power and getting disabled. Have you tried unplugging and plugging it back in?

If the second option, then it's a hardware failure. Make sure your memory is properly seated and that your CPU is in place. Try swapping out memory modules to see if they're defective. Isolate components to see which may be at fault.

If the keyboard and mouse stopped working then he should still be able to do a normal shutdown by pressing the power button.