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ArcaneKnite

A little less than a month ago, my computer suddenly crashed on me while I was browsing the web, and when I tried to turn it back on, it got caught in a boot loop. All my fans would start spinning up for a second, and a few LEDs on my motherboard would turn on, but before reaching BIOS, the computer would turn off. Without me having to do anything, it will try to boot up again, and the cycle will keep on going until I unplug the machine.

I didn't have time to try and fix it since then, but today, I tried a few conventional methods and nothing seems to work. Things I have tried:

1. Resetting CMOS by removing battery.
2. Unplugging everything, and reseating motherboard.
3. After that, I tried booting with nothing installed but the CPU, but the problem persisted.
4. I tested my PSU on another computer and it worked.

I looked at my bare motherboard but saw no signs of a burn or burst capacitor. I don't know how to check for any physical signs of CPU failure, do you guys have any hints? Does anybody have a clue as to what's going on?

Specs -
CPU - Core i5 2500K
Mobo - Gigabyte Z68X UD4B3 Rev 1.0
SSD - Intel 520 Series 240GB
HDD - WD Caviar Black 1TB
GPU - Radeon HD 6870 (Asus)
PSU - OCZ Z Series 1000W
Chassis - CM HAF 922

++METHOS · Posted: Thu Apr 25, 2013 8:49 pm Post subject:

Assuming your hard drive is fine since BIOS isn't even loading completely, I would have tried:

1. Clearing CMOS by removing battery
2. Clearing CMOS with motherboard jumper
3. Checking internal cables to ensure that they are secure and properly connected
4. Checking cooling system/fan and then power supply

Other things are possible, but not as likely, probably.

Have any of your internal fans been louder or quieter than normal, lately?

ArcaneKnite · Posted: Thu Apr 25, 2013 9:16 pm Post subject:

Fans have been the same noise level as far as I've noticed. I've removed the CMOS battery and tried the reset jumpers to no avail.

I've reseated everything in my computer and made sure all the connecting cables are secure.

++METHOS · Posted: Thu Apr 25, 2013 9:38 pm Post subject:

Since you can't load BIOS to check thermals, you might try swapping out the power supply.

If cooling systems are fine and power supply is fine, you'd then want to check the motherboard.

At this point, if the computer does not have a valid warranty but is fairly new, you might consider having a computer tech take a look as they will have the hardware handy for diagnosis.

Dark Byte · Posted: Fri Apr 26, 2013 1:06 am Post subject:

It could be the RAM , GPU Mainbord or CPU
A shame computers these days don't have beepers anymore. I take it your mainboard also doesn't have a led display stating the current bootup state?

ArcaneKnite · Posted: Fri Apr 26, 2013 2:12 pm Post subject:

++METHOS · Posted: Fri Apr 26, 2013 2:22 pm Post subject:

The only way you can really check the motherboard without having someone take a look at it, would be to swap it out. Other than that, you can really only use common sense and examine it closely to make sure everything looks all right. Really, that's all most computer tech people will do...just swap out parts until they find the problem.

jucce · Posted: Fri Apr 26, 2013 6:19 pm Post subject:

Actually take a look at this, looks useful:
http://docs.google.com/viewer?a=v&q=cache%3aVEXgWx3vr0QJ%3a[...]ZRacamost2R&sig=AHIEtbQYMcpeY2RG_59tQNQNjAXDvaBWIA&pli=1
It's a guide for troubleshooting CPU, RAM and motherboard issues.

++METHOS · Posted: Fri Apr 26, 2013 6:28 pm Post subject:

Looks like a good resource. Just to be clear, my comments above were a response to the OP, assuming he knew little about computers...as most people would find even that troubleshooting article to be too much. Looks like something the OP could handle, though. Very Happy