Yesterday while watching movie my display gone blank but in background movie was running. Then restarted, after a while same problem again. Removed the GPU, cleaned and checked the thermal paste, it was in sufficient amount. And the GPU temp is also ok. Tried with Built in GPU, no problem at all and ran quite a time, its totally fine. Then re attached the gpu and again after a while monitor goes blank. It goes blank randomly.
GPU : MSI GTX 970 (5 years old)
PSU : Corsair VS450 (5 years old)
My suspicion : Faulty PSU or the GPU gone EOL.
Anyone please any suggestions? What exactly the issue here.