Beep Code     Description
No Beeps    No Power, Loose Card, or Short.
1 Short Beep    Normal POST, computer is ok.
2 Short Beep    POST error, review screen for error code.
Continuous Beep    No Power, Loose Card, or Short.
Repeating Short Beep    No Power, Loose Card, or Short.
One Long and one Short Beep    Motherboard issue.
One Long and Two Short Beeps    Video (Mono/CGA Display Circuitry) issue.
One Long and Three Short Beeps.    Video (EGA) Display Circuitry.
Three Long Beeps    Keyboard / Keyboard card error.
One Beep, Blank or Incorrect Display    Video Display Circuitry.