Support ArticleDELL BIOS / Motherboard POST Error Codes
QuickPOST SeriesPOST Error CodesUpdated 6/14/2019
| Code |
Meaning |
| 01 |
CPU register test in progress |
| 02 |
CMOS read/write test failed |
| 03 |
BIOS ROM checksum bad |
| 04 |
8254 programmable interrupt controller failed |
| 05 |
DMA controller initialization failed |
| 06 |
DMA page-register test failed |
| 08 |
RAM refresh verification failed |
| 09 |
Starting first-64K RAM test |
| 0A |
First-64KB RAM IC or data line bad |
| 0B |
First-64KB RAM odd/even logic bad |
| 0C |
First-64KB address line bad |
| 0D |
First-64KB parity error |
| 10 |
Bit 0 bad in first 64KB |
| 11 |
Bit 1 bad in first 64KB |
| 12 |
Bit 2 bad in first 64KB |
| 13 |
Bit 3 bad in first 64KB |
| 14 |
Bit 4 bad in first 64KB |
| 15 |
Bit 5 bad in first 64KB |
| 16 |
Bit 6 bad in first 64KB |
| 17 |
Bit 7 bad in first 64KB |
| 18 |
Bit 8 bad in first 64KB |
| 19 |
Bit 9 bad in first 64KB |
| 1A |
Bit 10 bad in first 64KB |
| 1B |
Bit 11 bad in first 64KB |
| 1C |
Bit 12 bad in first 64KB |
| 1D |
Bit 13 bad in first 64KB |
| 1E |
Bit 14 bad in first 64KB |
| 1F |
Bit 15 bad in first 64KB |
| 20 |
Slave DMA register bad |
| 21 |
Master DMA register bad |
| 22 |
Master interrupt-mask register bad |
| 23 |
Slave interrupt-mask register bad |
| 25 |
Loading interrupt vectors |
| 27 |
Keyboard-controller test failed |
| 28 |
CMOS RAM battery bad |
| 29 |
CMOS configuration validation in progress |
| 2B |
Video-memory test failed |
| 2C |
Video initialization failure |
| 2D |
Video-retrace failure |
| 2E |
Searching for a video ROM |
| 30 |
Switching to video ROM |
| 31 |
Monochrome operation OK |
| 32 |
Color (CGA) operation OK |
| 33 |
Color operation OK |
| 34 |
Timer-tick interrupt in progress (or bad) |
| 35 |
CMOS shutdown test in progress (or bad) |
| 36 |
Gate A20 bad |
| 37 |
Unexpected interrupt in protected mode |
| 38 |
RAM test in progress or high address line is bad |
| 3A |
Interval timer channel 2 bad |
| 3B |
Time-of-day test bad |
| 3C |
Serial-port test bad |
| 3D |
Parallel -port test bad |
| 3E |
Math co-processor test bad |
| 3F |
Cache-memory test bad |
