System is not starting (MS-7058)

Question

Hi All,
       I need some help from you. I am using P4 3GHz LGA775 socket CPU with MSI motherboard MS-7058(915-G Combo) since last 2 years. Last Week all of sudden, the CPU fan speed increased after 20 minutes of operation(which was not heavy resource task) and then my system automatically shut down(not normal shut down though). After this incident, whenever I tried to restart the PC, I was not able to start it. Only HDD LED glows and my Sony CD-RW LED remains continuously glowed. Neither its CD tray opens nor any operation can be done on system(which makes me feel that system is dead :( ). Whenever I boot the system, my monitor, which is directly connected to same supply, starts blinking. The BIOS window is also not appearing. I have tested its DDR - RAM(512MB DDR-400) and HDD(80GB Samsung SATA) on my frined's PC but both are working fine.I also changed the Mother board battery and tried changed Motherboard SMPS but still same things are happening. So, I think, there might be fault in  AMI BIOS(either corrupted or IC is damaged) or CPU is damaged because the Power Supply is OK with CPU and MB. Please advice on this  
Regards,
Techkid.

Answer 1

Quote from: techkid on 13-November-06, 12:59:28
Last Week all of sudden, the CPU fan speed increased after 20 minutes of operation(which was not heavy resource task) and then my system automatically shut down(not normal shut down though). After this incident, whenever I tried to restart the PC, I was not able to start it.
seems to me that there might have sudden increase in voltage supplied to the cpu which cause the fan to speed up within a short period of time. check your motherboard for any bad capacitors, eg. bloated tops, brownish substances leaked from the bottom...  failing capacitors can cause damage to the voltage regulators, making your motherboard to become a junk.