Power-on self-test
Standard Original IBM POST Error Codes
- 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
IBM POST Diagnostic Code Descriptions
- 100 to 199 - System Board
- 200 to 299 - Memory
- 300 to 399 - Keyboard
- 400 to 499 - Monochrome Display
- 500 to 599 - Color/Graphics Display
- 600 to 699 - Floppy-disk drive and/or Adapter
- 700 to 799 - Math Coprocessor
- 900 to 999 - Parallel Printer Port
- 1000 to 1099 - Alternate Printer Adapter
- 1100 to 1299 - Asynchronous Communication Device, Adapter, or Port
- 1300 to 1399 - Game Port
- 1400 to 1499 - Color/Graphics Printer
- 1500 to 1599 - Synchronous Communication Device, Adapter, or Port
- 1700 to 1799 - Hard Drive and/or Adapter
- 1800 to 1899 - Expansion Unit (XT)
- 2000 to 2199 - Bisynchronous Communication Adapter
- 2400 to 2599 - EGA system-board Video (MCA)
- 3000 to 3199 - LAN Adapter
- 4800 to 4999 - Internal Modem
- 7000 to 7099 - Phoenix BIOS Chips
- 7300 to 7399 - 3.5" Disk Drive
- 8900 to 8999 - MIDI Adapter
- 11200 to 11299 - SCSI Adapter
- 21000 to 21099 - SCSI Fixed Disk and Controller
- 21500 to 21599 - SCSI CD-ROM System
See also
External links
- Power On Self Test Beep Codes for AMI and Phoenix BIOS - from PC Hell.
- Computer Hardware - Additional information on computer POST / Beep Codes - from Computer Hope.
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