Okay, so one of our computers had an issue where it wouldn't display anything on the screens, at first we thought it was a video card error so swapped out the card, no luck, checked and swapped out the cables, swapped out the RAM, nothing. At this point we rang the local computer shop to get a quote on them doing a diagnostic but they had a 5 day wait, so we thought we'd try a bit more before booking it in. The guy on the phone suggested resetting the BIOS by removing a battery on the motherboard for 5 mins, so we did that (possibly foolishly). Didn't work.
Anyway, while we were just standing there looking at the black screens, the power cut off and restarted a couple of times, so we thought - power supply! We went and bought a new power supply and installed it and voila! the screens came on when the PC booted up.
The actual problem:
So here's where it gets tricky. On bootup, it asked to press F1 to setup BIOS or F2 to restore defaults. We opted for F2 as the BIOS had never been customised. Proceeding through the boot process, it asks for a boot disk. Damn.
This computer has 5 internal drives installed, so we go into BIOS and have a look. The drives are there, we play around with boot sequence (not knowing the drives by their "true" names, it took a while to find the bootable one). Weirdly, that drive comes up as [Not detected] on the Main page, but is shown in the Boot Device Priority section of the Boot settings page and able to be selected as the IDE drive.
Once we got it to boot into Windows at last, everything looked normal, same desktop settings, internet connection etc. But the drives are not visible in File Explorer and they are also not visible in Disk Management, not even as unmapped drives. A lot of programs are installed on drives other than the boot drive, so hardly anything runs. A prompt asking for the location of the program appears when the shortcut is run.
Any help would be appreciated
Trying to google this error comes up with lots of new drives that are not recognised by Windows 10 but not existing drives that have disappeared en masse. Formatting is not an option we would like to take, obviously. But the fact that all four drives are "missing" seems like it's not a problem specific to the drives themselves but more something in the software reading them.
Anyway, we are currently stumped, so if anyone else has had the same kind of problem or has an idea about how to find the missing drives, that would be awesome.