I have an xbox which I took apart. So I used the hdd from that one and replaced it with another xbox and the eeprom didnt recognize so it had the flashing lights and error 6. Now when I had put the original hdd back in the original xbox it came from it will immeditately flash re/green and there will be no video. Also in case this mattered, it's softmodded.
*Also this is NOT my xbox and I would greatly appreciate if someone could respond soon, thanks*