No Display From my GPU

Registration date
Tuesday July 27, 2021
Last seen
July 27, 2021
I am using gtx1660. After upgrading to windows 11 beta my graphics card was going blank (every time it was showing random color fill blue, black, ash, white). After that, I reinstalled windows 10 OS with a new SSD. After that when I was installing the GPU driver it was going the color blank screen after 10-20 sec. And later after 3 days now it's completely gone blank even not showing bios. GPU fan and lights are working! What to do now? Please help.

I tried these methods
Clean RAM, changed PCI Slot, checked in another motherboard, Reassembled everything, Changed Powersupply, but still not working.

System Configuration: Windows / Chrome 92.0.4515.107