I have purchased computer a month before with configuration AMD phenom x2 550 black editions ASUS M2N68-AM motherboard 2 GB Kingston RAM 500 GB SandiskHard Disk It worked fine for 3 weeks, but after that it started freezing without any reason. Pressing num key or caps lock key don’t turn ON any light. The only solution is to turn off power supply. After turning ON power supply when I press the cabinet button, only the light on DVD player glows. But pc doesn’t boot .For next half an hour or an hour I cant boot my PC. After half an hour if I turn ON power supply, PC boots, but again after some time it freezes. The time it takes to freeze varies from 10 sec to 10 mins. Even if don’t do anything on my PC, it freezes automatically. I am not able to run or install any software to check faults as PC runs max for 10 mins. I replaced RAM, but still it is giving same problem. I checked motherboard also. Is the problem bcoz of BIOS version??? Is my processor faulty??

Sounds more like a heat issue, with either the processor or the power supply - having to leave it for a while, to essentially cool down, is a good clue - it may well be a bad joint on te motherboard that expands & contracts as the system heats/cools. If you've only recently bought it then take it back as being unusable & get the vendor to check everything. "I've always been mad, I know I've been mad, like the most of us..."

My guess would be overheating. Next time you bootup, immediately enter the BIOS, go to the PC Health menu & check the CPU temp. Sit there for a few minutes & see if the temp gradually increases. If it does, you've found your problem. Check the heatsink/fan installation.

thnx guys......

hey i checked the temperature of cpu. it remained constant after 15 mins at 54degree celcius,and MB temp was 42 C. i checked for 55 mins.but when i came out of bios by clicking esc button it freezed. I turned OFF the power supply, i tried to start again but again only the light on DVD player glowed but CPU didnt boot...when i tried to boot it after 1 hour,it booted.

When i searched for the recommended temp for the processor ,i found that on some sites that under load also AMD processors temp remains under 40C.But on some sites it was mentioned that with any cooling mechanism AMD processors temp remains between 50C to 60C under load. But with my case ,my cpu was idle,just BIOS program was running.Is it a problem of processor or heat sink???? cpu fan speed was varying between 3000 RPM to 3100 RPM(i think it is very low) vcore voltage 1.344v 3.3 voltage 3.42v 5v voltage 5.120v 12v voltage 12.22v