Originally Posted by lyecdevf
So I figured I would apply some new temp. paste. So I took it all appart and now the screen is blank.
-Make sure you assembled it correctly. If you're not sure, take it apart again and put it back together very carefully. You probably missed something in between.
-Check that the power cable (if there is any connected to the GPU) is secured and connected properly.
-Reseat the video card. Maybe it's not sitting well.
The temperature sensor could be faulty. Have you tried it anywhere else? Or just between the heatsink and processor?
If your graphic card is constantly overheating you can do either of the following:
-Get an aftermarket cooler for the graphic card.
-Increase airflow in the case, especially towards the GPU.
-Lower the ambient temperature in the room.
-Clean the dust out of your PC and/or video card.