error beeps
1 short beep | Normal POST - system is ok |
| 2 short beeps | POST Error - error code shown on screen |
| No beep | Power supply or system board problem |
| Continuous beep | Power supply, system board, or keyboard problem |
| Repeating short beeps | Power supply or system board problem |
| 1 long, 1 short beep | System board problem |
| 1 long, 2 short beeps | Display adapter problem (MDA, CGA) |
| 1 long, 3 short beeps | Enhanced Graphics Adapter (EGA) |
| 3 long beeps | 3270 keyboard card |
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