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IBM, Compaq and Quadtel Bios Beeps Cheat Sheet by

beep     ibm     codes     bios     compaq     quadtel

Introd­uction

On startup, computers perform a Power-on Self Test, commonly referred to as a POST. If problems are found while booting, you can usually diagnose them using the error codes displayed on the screen. However, if nothing displays on the screen, the computer might use sounds (i.e., beep codes) to tell you what is wrong. Many of these errors indicate hardware problems that should be fixed. However, some errors are easily fixed.

IBM Desktop

Beeps
Mean­ing
No beep
No power, loose expansion card (ISA, PCI, or AGP), a short, or an improperly grounded mother­board
1 short
System okay
1 long
Video/­display problem; video card incorr­ectly seated or defective
2 short
POST Error displayed on monitor
3 long
Problem with 3270 keyboard card
1 long,
1 short
Problem with system board
1 long,
2 short
Problem with display adapter (MDA, CGA)
1 long,
3 short
Problem with EGA
Repeating short beeps
Problem with power supply or system board
Continuous beep
Problem with power supply or system board

IBM ThinkPad

Beeps
Mean­ing
Continuous beeping
System board failure
1 beep with blank display
LCD connector problem, LCD backlight inverter failure, video adapter failure, or LCD assembly failure
1 beep w/message "­Unable to access boot source­"
Boot device failure or bad system board
1 long, 2 short
System board, video adapter, or LCD assembly failure
1 long, 4 short
Low battery voltage
1 beep every second
Low battery voltage
2 short w/message
Read the error message on the display
2 short with blank display
System board failure
 

Compaq

Beep
Mean­ing
1 short
No error: The system is booting properly.
1 long,
1 short
BIOS ROM checksum error: The contents of the BIOS ROM do not match the expected contents. If possible, reload the BIOS from the PAQ.
2 short
General error: No specifics available on what this code means
1 long,
2 short
Video error: Check the video adapter and make sure it's seated properly. If possible, replace the video adapter.
7 beeps (1 long, 1 short, 1 long, 1 short, pause, 1 long, 1 short, 1 short)
AGP video: The AGP video card is faulty. Reseat the card or replace it outright. This beep pertains to Compaq Deskpro systems.
Continuous beep
Memory error: Bad RAM; replace and test
1 short,
2 long
Bad RAM: Reseat RAM, then retest; replace RAM if failure continues.
Inform­ation is from the BIOS Central Compaq BIOS Beep Codes page.

Quadtel BIOS

Beep
Mean­ing
1 short
Normal boot: System is booting normally.
2 short
CMOS IC error: The CMOS RAM is faulty. Replace the IC if possible.
1 long,
2 short
Video failure: The video adapter is faulty. Reseat the video adapter or replace the adapter if possible.
1 long,
3 short
Peripheral controller error: One or more of the system peripheral contro­llers is bad. Replace the contro­llers and retest.
Inform­ation is from the BIOS Central Quadtel BIOS Beep Codes page.

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