Graphic card missing from device manager

[haider.m.murad]

I have a XMG505 laptop, since 2015, and it was working fine until 2 weeks ago where my NVIDIA Geforce 980 M gone missing from device manager and games are not working but the laptop still working,
when I go to device manager and try Action>Add Legacy Hardware, and install one of those default drivers ( who actually do not work), the display adapter appear in device manager but then when I try to install the latest Nvidia driver it does not detect the card......
any help would be appreciated guys

 

[Phillip Corcoran]

If it's not shown in Device Manager and there are no unknown devices listed there (denoted by a yellow question mark), that usually means the device is faulty, such that it can no longer be detected.

This would require repair at a laptop repair centre or by the manufacturer if it's still covered by their warranty.