Question Can't access BIOS with drives connected

[kwax]

Hi,

So I recently upgraded my CPU and motherboard along with it. My new motherboard is the ASUS Prime Z790-P WiFi. When I first started the PC after installing the components, my Windows boot drive was broken/corrupt or something so couldn't launch into Windows. I tried resetting the drive, restoring an old point and various things in command prompt using the options Windows provide. Then, after reading a solution to a similar problem, I tried enabling CMS in the BIOS (which was disabled by default) and after this, when I booted, I still saw the boot screen where you access BIOS from but when I pressed F2, my screen would go black. I read around and figured maybe my GPU wasn't changing my monitor resolution to the right resolution for BIOS. I used all of the Display Ports, HDMI ports on my GPU and even tried a different monitor to no luck. I reset CMOS by taking the battery out which in hindsight re-disabled CMS but I was still having the same issue. I then read a thread about a laptop with a similar problem and the solution was to remove the HDD and then boot. I have 2 SSDs and 1 HDD connected. I unplugged all of them and I could access BIOS. I enabled CMS again to test the issue since I knew how to access BIOS to disable it now, turned my PC off, plugged in the drives and started it again. Couldn't access BIOS again.

I can't access BIOS with drives connected but I am trying to reinstall Windows on my drive since it's broken with a USB boot drive - will need my drive connected to repair/install Windows onto but can't access the boot menu to boot using USB drive with the other drive I want to install onto connected. Quite the paradox.

I need to be able to access the BIOS with drives connected is the problem I need fixing. Any advice?

 

[T_T]

Why not leave the drives disconnected, then get into the BIOS to change your boot priority to USB first/top?
Then you can reinstall your drives; insert the flash drive with your Windows installer; turn on PC. USB should now be the first boot device and you can then install Windows.

 

[faalin]

first off, new motherboard... new OS install. Yes sometimes moving an existing OS to a new motherboard will work but a lot of times you will have issues down the road or just not work like your case.

Second only install the OS drive when installing windows.

Third only plug the OS drive in and see if you can get to the bios. if you can then add another drive then try again, stop when all drives are installed or till you cant get to the bios with said attached drive.