POST Code Table
The following table lists the POST Code errors that are generated when a fatal error occurs during system boot.
| Fatal Error Code | Description | Cause |
| 80 | No memory detected. | This error code implies that no memory is installed. |
| 81 | Memory detected but is not configurable. | This error code indicates memory configuration error that could be a result of bad memory, mismatched memory or bad socket. |
| 82 | Memory configured but not usable. | This error code indicates memory sub-system failure. |
| 83 | System BIOS shadow failure. | This error code indicates system BIOS shadow failure. |
| 84 | CMOS failure. | This error code indicates that CMOS RAM is not working. |
| 85 | DMA controller failure. | This error code indicates DMA controller failure. |
| 86 | Interrupt controller failure. | This error code indicates interrupt controller failure. |
| 87 | Timer refresh failure. | This error code indicates timer refresh failure. |
| 88 | Programmable interval timer error. | This error code indicates a programmable interval timer error. |
| 89 | Parity error. | This error code indicates a parity error. |
| 8A | SIO failure. | This error code indicates SIO failure. |
| 8B | Keyboard controller failure. | This error code indicates keyboard controller failure. |
| 8C | SMI initialization failure. | This error code indicates SMI initialization failure. |
| C0 | Shutdown test failure. | This error code indicates a shutdown test failure. |
| C1 | POST Memory test failure. | This error code indicates bad memory detection. |
| C2 | RAC configuration failure. | Check screen for the actual error message. |
| C3 | CPU configuration failure. | Check screen for the actual error message. |
| C4 | Incorrect memory configuration. | Memory population order not correct. |
| FE | General failure after video. | Check screen for the actual error message. |

