Condition/ Beeps Code /Debug Code
Normal /1 short beep after POST /With goodnight LED enabled, debug code will disappear after the beep.
Bad CPU/ No beep No /debug code
Bad memory/ No beep/ 45
Without memory /3 long beeps /53
Without CPU/ No beep(No Power)/ No debug code
Without VGA card /5 long beeps Beeps at”d6”, then show "0d"