Decode the sequence of beeps to determine a BIOS or system error.
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
Code Description 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
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
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