cpu fan connector burned out

Thread Starter

Dabu WhiteHacker

Joined Sep 5, 2017
68
I had a very old PC, Dell optiplex 960 to be exact. i accidentally short circuit the the fan connector after which fan stopped spinning. I check the power and it was cut off so i started powering the fan using a pin(12v) from power supply connector(sata connector). Now the fan is spinning but the system does not detect it always and gives me annoying error each time i boot up. I have checked the rpm connector coming from the fan using multi-meter and it is working fine. Also the system is setting the speed of fan according to the temperature sensor(i actually tested it by heating it up and cooling it down) which means pwm pin is also working fine. The only problem is, it sometimes gives error of CPU fan not found.
 

Alec_t

Joined Sep 17, 2013
14,280
i accidentally short circuit the the fan connector after which fan stopped spinning. I check the power and it was cut off
I would guess a driver transistor has failed. If you can correctly identify the input connections to that transistor, then even if you can't replace the transistor you might be able to substitute a dummy load to fool the CPU.
 
Top