blue screen of death

Hey guys, so I'm trying to flash the bios of my ender 5 pro. I recently blue screened and am having quite a bit of difficulty getting the machine back up and running. I bought an elegoo Uno R3 in hopes to reset the bios. Thing is, all the videos on YouTube are telling me I need to connect it to a six pin header, but for some reason, I don't have 6 pins other than the slot that's taken up for the LCD screen. Any idea on what I should do?