My friend's motherboard LED is stuck on boot. I've changed the CPU, the drives, and I've even tried transplanting other drives. For instance, I transplanted my friend's M.2 into my M.2 slot, and it worked perfectly, but when I put my M.2 into his PC, it also didn't work. We also got another motherboard to try it on, and no dice. Additionally, I tried plugging in a Windows USB boot drive, and it didn't recognize it. Any help is appreciated.