I have been trying to put together a computer using older parts that I had from previous computers and I got everything working and everything booted up on a test bench but then I ordered a new case and some cable extensions for the computer and I put everything in and it gave me the error of the boot disk not being found or it failed which I thought was weird since it literally worked a couple days before I got the case and cable extensions. I assumed that since I was using and older HDD that maybe it did fail so I went out and got a new one and I reinstalled windows onto the new one and I got the same issue. I definitely knew it wasn’t the HDD this time so I put it I my own personally pc to see if it would boot and surely it did so I went back to the other pc and tried changing the boot orders I messed around with the boot orders and even tried it in legacy mode and still no luck. I’m starting to think maybe the motherboard might have failed but I’m not 100 percent sure so I’m seeking other solutions before I go out and keep buying new parts.