• The following are the IBM POST beep codes:
• 1 short beep: This shows that the POST was completed successfully with no errors.
• 2 short beeps: An error has occurred, and the notice has been displayed on the screen.
• No beep: No power or disconnection is indicated.
• Constant beeping: This indicates a problem with the power supply, motherboard, or keyboard.
• A single lengthy and one brief beep indicates an issue with the mother / system board.
• One long sound followed by two short beeps suggests a display adapter problem.

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