| Beep Code | Meaning |
| 1-1-1-3 | Faulty CPU/motherboard. Verify real mode. |
| 1-1-2-1 | Faulty CPU/motherboard. |
| 1-1-2-3 | Faulty motherboard or one of its components. |
| 1-1-3-1 | Faulty motherboard or one of its components. Initialize chipset registers with initial POST values. |
| 1-1-3-2 | Faulty motherboard or one of its components. |
| 1-1-3-3 | Faulty motherboard or one of its components. Initialize CPU registers. |
1-1-3-2 1-1-3-3 1-1-3-4 | Failure in the first 64K of memory. |
| 1-1-4-1 | Level 2 cache error. |
| 1-1-4-3 | I/O port error. |
| 1-2-1-1 | Power management error. |
1-2-1-2 1-2-1-3 | Faulty motherboard or one of its components. |
| 1-2-2-1 | Keyboard controller failure. |
| 1-2-2-3 | BIOS ROM error. |
| 1-2-3-1 | System timer error. |
| 1-2-3-3 | DMA error. |
| 1-2-4-1 | IRQ controller error. |
| 1-3-1-1 | DRAM refresh error. |
| 1-3-1-3 | A20 gate failure. |
| 1-3-2-1 | Faulty motherboard or one of its components. |
| 1-3-3-1 | Extended memory error. |
1-3-3-3 1-3-4-1 1-3-4-3 | Error in first 1MB of system memory. |
1-4-1-3 1-4-2-4 | CPU error. |
1-4-3-1 2-1-4-1 | BIOS ROM shadow error. |
1-4-3-2 1-4-3-3 | Level 2 cache error. |
1-4-4-1 1-4-4-2 2-1-1-1 | Faulty motherboard or one of its components. |
2-1-1-3 2-1-2-1 | IRQ failure. |
| 2-1-2-3 | BIOS ROM error. |
2-1-2-4 2-1-3-2 | I/O port failure. |
2-1-3-1 2-1-3-3 | Video system failure. |
2-1-1-3 2-1-2-1 | IRQ failure. |
| 2-1-2-3 | BIOS ROM error. |
| 2-1-2-4 | I/O port failure. |
2-1-4-3 2-2-1-1 | Video card failure. |
2-2-1-3 2-2-2-1 2-2-2-3 | Keyboard controller failure. |
| 2-2-3-1 | IRQ error. |
| 2-2-4-1 | Error in first 1MB of system memory. |
2-3-1-1 2-3-3-3 | Extended memory failure. |
| 2-3-2-1 | Faulty motherboard or one of its components. |
2-3-2-3 2-3-3-1 | Level 2 cache error. |
2-3-4-1 2-3-4-3 | Motherboard or video card failure. |
2-3-4-1 2-3-4-3 2-4-1-1 | Motherboard or video card failure. |
| 2-4-1-3 | Faulty motherboard or one of its components. |
| 2-4-2-1 | RTC error. |
| 2-4-2-3 | Keyboard controller error. |
| 2-4-4-1 | IRQ error. |
3-1-1-1 3-1-1-3 3-1-2-1 3-1-2-3 | I/O port error. |
3-1-3-1 3-1-3-3 | Faulty motherboard or one of its components. |
3-1-4-1 3-2-1-1 3-2-1-2 | Floppy drive or hard drive failure. |
| 3-2-1-3 | Faulty motherboard or one of its components. |
| 3-2-2-1 | Keyboard controller error. |
3-2-2-3 3-2-3-1 3-2-4-1 | Faulty motherboard or one of its components. |
| 3-2-4-3 | IRQ error. |
| 3-3-1-1 | RTC error. |
| 3-3-1-3 | Key lock error. |
| 3-3-3-3 | Faulty motherboard or one of its components. |
3-3-3-3 3-3-4-1 3-3-4-3 3-4-1-1 3-4-1-3 3-4-2-1 3-4-2-3 3-4-3-1 3-4-4-1 3-4-4-4 | Faulty motherboard or one of its components. |
| 4-1-1-1 | Floppy drive or hard drive failure. |
4-2-1-1 4-2-1-3 4-2-2-1 | IRQ failure. |
4-2-2-3 4-2-3-1 4-2-3-3 4-2-4-1 | Faulty motherboard or one of its components. |
| 4-2-4-3 | Keyboard controller error. |
4-3-1-3 4-3-1-4 4-3-2-1 4-3-2-2 4-3-3-1 4-3-4-1 4-3-4-3 | Faulty motherboard or one of its components. |
4-3-3-2 4-3-3-4 | IRQ failure. |
4-3-3-3 4-3-4-2 | Floppy drive or hard drive failure. |