Dell BIOS Post Codes: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
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