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Computer POST and beep codes The computer  POST  (power-on self-test) checks a computer's internal hardware for compatibility and connection before starting the remainder of the boot process. If the computer passes the POST, the computer may give a single beep (some computers may beep twice) as it starts and continue to boot. However, if the computer fails the POST, the computer will either not beep or generate a beep code that tells the user the source of the problem. If your computer has an irregular POST or a beep code not mentioned below, follow the POST troubleshooting steps  to determine the failing hardware component. AMI BIOS beep codes Award BIOS beep codes Dell beep codes IBM BIOS beep codes AMI BIOS beep codes Below are the  AMI  BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. Beep Code.    Descriptions 1 shortDRAM refresh failur...