The complete BIOS beep guide
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1 short DRAM refresh failure- The programmable interrupt timer or programmable interrupt controller has probably failed
2 short Memory parity error- A memory parity error has occurred in the first 64K of RAM. The RAM IC is probably bad
3 short Base 64K memory failure- A memory failure has occurred in the first 64K of RAM. The RAM IC is probably bad
4 short System timer failure- The system clock/timer IC has failed or there is a memory error in the first bank of memory
5 short Processor error- The system CPU has failed
6 short Gate A20 failure- The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller
7 short Virtual mode processor exception error- The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry
8 short Display memory read/write error- The system video adapter is missing or defective
9 short ROM checksum error- The contents of the system BIOS ROM does not match the expected checksum value. The BIOS ROM is probably defective and should be replaced
10 short CMOS shutdown register read/write error- The shutdown for the CMOS has failed
11 short Cache error- The L2 cache is faulty
1 long, 2 short Failure in video system- An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered
1 long, 3 short Memory test failure- A fault has been detected in memory above 64KB
1 long, 8 short Display test failure-The video adapter is either missing or defective
2 short POST [Power On Self Test] Failure- One of the hardware tests have failed. Frequently caused by failed ram, but not always.
1 long POST [Power On Self Test]- has passed all tests
1long, 2 short Video adapter error- Either video adapter is bad or is not seated properly. Also, check to ensure the monitor cable is connected properly.
Repeating (endless loop) Memory error- Check for improperly seated or missing memory.
1long, 3short No video card or bad video RAM- Reseat or replace the video card.
High frequency beeps while running Overheated CPU- Check the CPU fan for proper operation. Check the case for proper air flow.
Repeating High/Low CPU failure- Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat. Check the CPU fan or BIOS settings for proper fan speed.
1 short Normal POST- System is booting properly
2 short Initialization error- Error code is displayed
1 long, 1 short System board error
1 long, 2 short Video adapter error
1 long, 3 short EGA/VGA adapter error
3 long 3270 keyboard adapter error
Continuous Power supply error- Replace the power supply
999s Power supply error- Replace the power supply
No beep Power supply failure- Replace the power supply
Continuous beeping: System board failure
One beep; Unreadable, blank or flashing LCD: LCD connector problem; LCD backlight inverter failure; video adapter faulty; LCD assembly faulty; System board failure; or power supply failure
One beep /Message "Unable to access boot source": Boot device failure; system board failure
One long, two short beeps:System board failure- Video adapter problem; LCD assembly failure
One long, four short beeps: Low battery voltage
One beep every second: Low battery voltage
Two short beeps with error codes: POST error message
Two short beeps: System board failure
1 short CPU register test failure- The CPU has failed
2 short Keyboard controller buffer failure- The keyboard controller has failed
3 short Keyboard controller reset failure- The keyboard controller has failed or the motherboard circuitry is faulty
4 short Keyboard communication failure- Either the keyboard controller IC or the associated circuitry has failed. replace the keyboard first, then is still faulty, replace the keyboard controller IC
5 short Keyboard input failure- The keyboard controller IC has failed. Replace the IC
6 short System board chipset failure- The chipset on the motherboard has failed. Replace the motherboard.
9 short BIOS ROM checksum error- The BIOS ROM has failed. If possible, replace the BIOS on the motherboard
10 short System timer test failure- The system clock IC has failed. CMOS Battery might require replacement.
11 short ASIC failure- Motherboard circuitry has failed. Replace the motherboard
12 short CMOS RAM shutdown register failure- THE real time clock/CMOS IC failed. Replace the CMOS or motherboard
1 long DMA controller 0 failure- The DMA controller IC for channel 0 has failed. If possible, replace the IC
1 long, 1 short DMA controller 1 failure- The DMA controller IC for channel 1 has failed. If possible, replace the IC
1 long, 2 short Video vertical retrace failure- The video adapter has probably failed. Replace the video adapter
1 long, 3 short Video memory test failure- The video adapter's memory has failed. Replace the video adapter
1 long, 4 short Video adapter failure- The video adapter has failed. Replace the video adapter
1 long, 5 short 64KB memory failure- A failure has occurred in the base 64KB of memory. If possible, replace the RAM IC
1 long, 6 short Unable to load interrupt vectors- The BIOS was unable to load the interrupt vectors into memory
1 long, 7 short Unable to initialize video- This a video problem. Replace the video adapter first. If problem is still present, replace the motherboard
1 long, 8 short Video memory failure- The is a failure in the video memory. Replace the video adapter first. If problem is still present, replace the motherboard
1 short No error- System is booting properly
1 long, 1 short BIOS ROM checksum error- The contents of the BIOS ROM to not match the expected contents. If possible, reload the BIOS from the PAQ
2 short General error- Unknown
1 long, 2 short Video error- Check the video adapter and ensure it's seated properly. If possible, replace the video adapter
7 beeps (1 long, 1s, 1l, 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
1 long never ending beep Memory error- Bad RAM. Replace and test
1 short, 2 long Bad RAM- Reseat RAM then retest; replace RAM if failure continues
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