UEFI and Legacy mode disabled on and now computer wont start

[egor05]

Hello! I'm tried to change my boot order in UEFI and I disabled UEFI and legacy modes and now when reboot the computer it beeps 4 times and just go the black screen with no video input at all. I tried to press f2 or del keys but it only beep one time and nothing else happens. I just tried to unplug the HDD but the problems stays the same. Also the computer is new so doesnt come from the hardware.

Thanks in advance!

 

[The Paladin]

desktop or laptop?
if desktop open case, disconnect power cable from wall, remove cmos battery for 3-4 mins, reinstall battery on motherboard, connect power reboot.

do not disable UEFI and Legacy at same time
why are you trying to disable anything ? for what purpose.

 

[egor05]

Its an desktop. I was trying to to use my windows 10 disc to install it. I found that all that I should is to go to the boot menu in the UEFI and to switch the boot priority to my HDD but the problem stayed the same it just loads the screen with error "Reboot and insert proper boot device...". That is why I started to try something else, hope that I didnt screwed up anything with it...

Thank you for answer by the way, I will try to do this now.