My Geforce 1050 Ti and Dell Optiplex 9020 combo was working fine until a couple of weeks ago. The graphics card has stopped giving a signal when booting. It sometimes works, but I'd have to reboot the computer several times for it to work. The onboard graphics gives signal but I can't game using that. Secure Boot, and Block Sleep (S3 State) are disabled in BIOS, and Boot List Option is set to Legacy. Legacy Option ROMs is enabled in BIOS. Nivida card is not showing up under Primary Display list in BIOS. It used to work fine with these settings until a week ago. When I change boot mode to UEFI, it can't find the boot drive (it says no boot devices found). Any suggestions on how to get the graphics card to work again would be appreciated.