beep codes find out which hardware is not working..


Standard Original IBM POST Error Codes
Code Description

1    short beep 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 Display adapter problem (EGA)
3    long beeps 3270 keyboard card
IBM POST Diagnostic Code Descriptions
100 – 199    System Board
200 – 299   Memory
300 – 399   Keyboard
400 – 499    Monochrome Display
500 – 599    Colour/Graphics Display
600 – 699    Floppy-disk drive and/or Adapter
700 – 799     Math Coprocessor
900 – 999     Parallel Printer Port
1000 – 1099    Alternate Printer Adapter
1100 – 1299     Asynchronous Communication Device, Adapter, or Port
1300 – 1399     Game Port
1400 – 1499     Colour/Graphics Printer
1500 – 1599     Synchronous Communication Device, Adapter, or Port
1700 – 1799      Hard Drive and/or Adapter
1800 – 1899     Expansion Unit (XT)
2000 – 2199     Bisynchronous Communication Adapter
2400 – 2599    EGA system-board Video (MCA)
3000 – 3199    LAN Adapter
4800 – 4999     Internal Modem
7000 – 7099    Phoenix BIOS Chips
7300 – 7399     3.5″ Disk Drive
8900 – 8999      MIDI Adapter
11200 – 11299   SCSI Adapter
21000 – 21099   SCSI Fixed Disk and Controller
21500 – 21599    SCSI CD-ROM System

AMI BIOS Beep Codes
Code Description

1    Short Beep         System OK
2   Short Beeps        Parity error in the first 64 KB of memory
3    Short Beeps        Memory failure in the first 64 KB
4    Short Beeps       Memory failure in the first 64 KB Operational of memory
or Timer 1 on the motherboard is not functioning
5   Short Beeps        The CPU on the motherboard generated an error
6    Short Beeps        The keyboard controller may be bad. The BIOS cannot switch to protected mode
7    Short Beeps         The CPU generated an exception interrupt
8     Short Beeps        The system video adapter is either missing, or its memory is faulty
9     Short Beeps         The ROM checksum value does not match the value encoded in the BIOS
10    Short Beeps        The shutdown register for CMOS RAM failed
11    Short Beeps                         The external cache is faulty
1   Long, 3 Short Beeps           Memory Problems
1 Long, 8 Short Beeps             Video Card Problems

Phoenix BIOS Beep Codes
Note – Phoenix BIOS emits three sets of beeps, separated by a brief pause.

Code Description
1-1-3                                   CMOS read/write failure
1-1-4                                   ROM BIOS checksum error
1-2-1                                   Programmable interval timer failure
1-2-2                                 DMA initialisation failure
1-2-3                               DMA page register read/write failure
1-3-1                                 RAM refresh verification failure
1-3-3                                  First 64k RAM chip or data line failure
1-3-4                                  First 64k RAM odd/even logic failure
1-4-1                                    Address line failure first 64k RAM
1-4-2                                  Parity failure first 64k RAM
2-_-_                                   Faulty Memory
3-1-_                                        Faulty Motherboard
3-2-4                                    Keyboard controller Test failure
3-3-4                                     Screen initialisation failure
3-4-1                                     Screen retrace test failure
3-4-2                                     Search for video ROM in progress
4-2-1                                   Timer tick interrupt in progress or failure
4-2-2                                  Shutdown test in progress or failure
4-2-3                                  Gate A20 failure
4-2-4                                  Unexpected interrupt in protected mode
4-3-1                                   RAM test in progress or failure>ffffh
4-3-2                                   Faulty Motherboard
4-3-3                                   Interval timer channel 2 test or failure
4-3-4                                    Time of Day clock test failure
4-4-1                                     Serial port test or failure
4-4-2                                    Parallel port test or failure
4-4-3                                     Math coprocessor test or failure
Low 1-1-2                             System Board select failure
Low 1-1-3                             Extended CMOS RAM failure

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