IBM BIOS beep codes

Below are IBM BIOS Beep codes that can occur. However, because of the wide variety of models shipping with this BIOS, the beep codes may vary.

Beep Code	Description	Document
No Beeps	No Power, Loose Card, or Short.	CH000312
1 Short Beep	Normal POST, computer is ok.	No problem
2 Short Beep	POST error, review screen for error code.	See screen
Continuous Beep	No Power, Loose Card, or Short.	CH000607
Repeating Short Beep	No Power, Loose Card, or Short.	CH000607
One Long and one Short Beep	Motherboard issue.	CH000607
One Long and Two Short Beeps	Video (Mono/CGA Display Circuitry) issue.	CH000607
One Long and Three Short Beeps.	Video (EGA) Display Circuitry.	CH000607
Three Long Beeps	Keyboard / Keyboard card error.	CH000304
One Beep, Blank or Incorrect Display	Video Display Circuitry.	CH000607