Clone PC with M825G v9.2A motherboard, AMD cpu, about 4 years old, suddenly powered down during normal operation. Power would not turn back on. Replaced power supply, but same problem. After investigation, it turns out that IF the CPU power plug is removed from the motherboard, the powersupply, fans, etc. will start. Re-attaching the CPU plug to the motherboard sparks, and kills the power supply (self-protection circuitry). Inspected motherboard, no obvious sign of burns or shorts. Is the problem the motherboard, or the CPU? All cards, memory have been removed, same problem occurs
Computers & Internet - PC Chips - M825G MOTHERBOARD, K7, Socket A, Athlon, Athlon XP, Duron,...
Answers & Comments
Garybris
Most likely you lost the motherboard as well. Alot of times when I have motherboard problems there is a problem with the powersupply. Usually if one has a problem it will damagge the other.
Example I just had a system where the power supply was having trouble and I replaced it. The system worked again for about a week then the motherboard died. When I replaced the motherboard I found that the new power supply was dead too.
So you can see that if one has a problem it can cause a problem for the other one. So I would recommend also replacing the motherboard and hopefully the reset of the hardware is ok. Every so often I will see a system fully fry everything.
Let me know if you have any more questions
Issken
http://www.fixya.com/users/issken
garybris
It is possible that the CPU is bad. Unfortantly really the only way to test it is on a known good motherboard.
As for the powersupply even if the old powersupply would power on the system you need to connect a tester to it to make sure all the power rails are workign properly. If even one rail it not working properly this can cause hardware problems and you run the chance of damaging the system.
Also have you tried the memory in another system to see if the memory is working properly.
Issken
http://www.fixya.com/users/issken