There is a small device that plugs into the back of the computer. It looks like a flash-drive. At first I thought it was a dongle supporting the wireless keyboard and wireless mouse. But when I opened the cack of the computer and oncovered the motherboar d I noticed that the device plugs into a USB socket that has a little sticker on the socket. The sticker says, "AMI-Aptio CP 62 2205" Could this flask-drive-looking device actually be the computer's BIOS chip? and if so, caqn I order a replacement one. And will that, maybe, solve the BLACK screen-at-boot-up problem?