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Computer BIOS 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.

Original link: http://www.computerhope.com/beep.htm

2 Responsesso far.

  1. 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.

  2. dailyalexa says:

    It s amazing how many times this fixes it. I have had several computers that at the start of every summer would stop working, beep madly, and just wanted their RAM taken out and put back in again.

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