Beep Codes
Beep Codes
One beep and the appearance of text on the monitor indicates
successful completion of POST. More than one beep indicates that
POST detects an error.
Beep codes are sounded in a series of four sets of beeps. The
duration of each beep is constant, but the length of the pause
between the beeps varies. For example, a 1–2–3–3 beep code sounds
like one beep, a pause, two consecutive beeps, another pause, three
more consecutive beeps, another pause, and three more consecutive
beeps.
It is possible to misinterpret a beep code if you do not understand
exactly how they work. Keeping in mind that POST error codes
vary in the length of the pause, and not the duration of the beep
tones will help you to distinguish the beeps.
Beep Code Chart
Beep Code Description
1-2-3-3
1-3-1-3
2-1-2-3
2-2-3-1
BIOS ROM check failure.
The keyboard controller failed.
ROM copyright notice test failed.
The interrupt test failed.
Action: Have the system serviced.
1-3-1-1
1-3-4-1
1-3-4-3
RAM refresh verification failed.
There is an address line failure within the first 512 KB of RAM.
There is a memory test failure within the first 512 KB of RAM.
Action:
1. Reseat the memory module.
2. Run the diagnostic program. See “Starting the Test
Programs” on page 318.
If the problem recurs, have the system serviced.
Chapter 7. Solving Problems 349
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