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IBM BIOS Beep codes

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This document gives troubleshooting tips for IBM BIOS Beep codes when you hear beep codes and your desktop board does not boot up successfully.

Beep CodeDescriptions
No BeepsNo Power, Loose Card, or Short.
1 Short BeepNormal POST, computer is ok.
2 Short BeepPOST error, review screen for error code.
Continuous BeepNo Power, Loose Card, or Short.
Repeating Short BeepNo Power, Loose Card, or Short.
One Long and one Short BeepMotherboard issue.
One Long and Two short BeepsVideo (Mono/CGA Display Circuitry) issue.
One Long and Three Short Beeps.Video (EGA) Display Circuitry.
Three Long BeepsKeyboard / Keyboard card error.
One Beep, Blank or Incorrect DisplayVideo Display Circuitry.

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