Computer crashed, then died -- Help

J

JustJoe

Geek Trainee
Hi. The computer consists of:
Mainboard Gigabyte GA-B75M-D3H
CPU i7-2600 (Sandy Bridge)
RAM 8GB (2x4GB) RipJaws FD-10666CL9D-8GBRL
PSU Seasonic X-560 80 PLUS GOLD
2TB Hard Drive and DVD Optical Drive.
Using i7 integrated graphics.

A few times, the computer has crashed with the following symptom: the screen suddenly is filled with random, various coloured short lines and dots changing at a very rapid pace, and the machine is completely locked up--it must be reset (reset button) or powered off. When this has happened previously, doing a reset, or a power off and then on, has restored normal operation. The machine runs cool (CPU 28-31 at idle, a few degrees above ambient, and never really reaches full load), and the case is clean.

But yesterday when this occurred, I pressed the reset button, and the screen went black (as it normally does at the beginning of a restart), but it did not restart; the monitor remained in sleep mode (black screen, power button blinking), and after about ten seconds, the computer powered off, and then five seconds later powered on, and again after ten seconds powered off and five seconds later powered on, and this continued until I held the power button for five seconds to shut is off and make it stay off. It was as though it was trying to reboot (case fans spin, CPU fan spins, hard drive and optical drive seek) without success (there was never any signal to the monitor).

I replaced the power supply, since I had one available, but received exactly the same symptoms. So that rules out the power supply, and I doubt the hard drive or optical drive could cause such symptoms.

That leaves the mainboard, the CPU, and the RAM. I just last week ran MemTest86+ for move than 5.5 hours, completing more than five complete passes, without a single error.

So, I need some input. What should I try next? I don't have either a spare CPU or a spare mainboard, so replacing either of those would mean buying a new one (expensive!), and also don't have another system to test the CPU in.

Help?!?
 
Well, there is no discrete video card, since I'm using the integrated graphics. And the monitor works fine with another computer.
 
The board is less than a year old. All components were purchased new. If I had a video card, I would put it in, but don't think it would help since the computer can't even post... it just cycles power over and over.
 
Will it boot from a cd ? Or will it go into safe mode ?Could be a Virus or Hard drive going Bad.. Try Spinrite or Hard drive Regenator ..
 
maybe try another power supply even if the fan is still running at the back of the power supply it can still fail
like i say try different power supply gigabyte mother are well built i can t see any problem with that the other thing is check
the heat sink it it install proper install i mean like if it intel stock heatsink they are a pain in the A...
let us know
 
Hi. Like I said in first post, I did try another power supply (with a PC Power & Cooling 610W unit), with same results.

However, after putting the original power supply back in and reconnecting all the wiring, the computer powered right up, and has been working since (I'm using it now).

Original problem? Don't know. Possibly a bad connection? Or a short that went away when things were moved around?
 
JustJoe said:
Hi. Like I said in first post, I did try another power supply (with a PC Power & Cooling 610W unit), with same results.

However, after putting the original power supply back in and reconnecting all the wiring, the computer powered right up, and has been working since (I'm using it now).

Original problem? Don't know. Possibly a bad connection? Or a short that went away when things were moved around?
Click to expand...

maybe keep an eye on it the other thing to do is remove all the ram then put one stick in one socket then power it up
also since it boot now try put a newest bios not the beta version and if you have the newest bios then download it and install again you never know could have been
corrupt also clear your cmos to default
 
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