SYSTEM BEEP SOUNDS AND PROBLEMS

Standard Original IBM POST Error Codes

1 short beep - System is OK
2 short beeps - 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 - keyboard card problem

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

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

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