Question GPU not working but fan is spinning and LED still working


Jul 4, 2014
Hi there
My PC was working all fine. Until the electrecity has suddenly disconnected for seconds then came back. Once I turn On the PC back it works fine, the fans and LEDs of Case were working all as normal.

However, the screen was showing a black screen with NO SIGNAL message.
I tried to plug in and out the DP port from both the GPU and screen with no benefit .

The LED logo of GPU is working and fans of the GPU is still spinning normally as well!
I tried to plug the screen to the motherboard insted of GPU and it works fine. I tried to open device manager and I could not see my GPU, I tried to open Nvidia Geforce app as well and it says no NIVIDA card is found!

I tried to plug in and out the GPU with no benifit.
Any help?

CPU Intel Core i7-4790K
M/B: Gigabyte GA-Z97X-UD3H-BK
GPU: Gigabyte GeForce RTX 2080