BIOS beep codes
POST procedure overviewEach time you turn on your computer, it starts the POST (Power On Self Test) procedure. What that procedure does? Below is a typical common POST procedure:
1) Power Supply test
2) CPU test
3) BIOS test
4) BIOS checksum test
5) CMOS test
6) CMOS checksum test
7) CPU operations test
8 ) RAM test
9) I/O bus test
10) video RAM
If the computer does not pass any of the above tests, your computer will produce a beep error code.
Notice that really often beep codes don't mean an actual hardware failure. Before throwing away your video adapter, RAM module, CPU and so on, make sure that you entered the correct BIOS settings first, then check whether you plugged cables and boards properly.
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