Yesterday, I was cleaning my PC and after that, I tried to boot my pc and itself automatically after sometime.
I checked all the fans and notice that my Nvidia GeForce 8400 GS Graphic card fan is stopped spinning and card is overheating. I've removed and re-attached the 2-pin power connector for fan and even reseated Graphic Card but still no luck.
I peeled the sticker on the fan and place 2-drop of oil into axis. I tried to spin the fan with my hand and nothing seems to be blocking.
My question is -
1) How can I diagnose that 2-pin power connector on the graphic card is getting power?
2) Can I use another power source from mother board if the pin on graphic card is not getting power?
3) If the fan is defective, can I replace the fan alone without buying new Graphic Card?