Computer boot shows no signal.

1 short: the system starts normally. Indicates that there is nothing wrong with the machine.

2 Short: General error, please enter CMOS settings and reset incorrect options.

1 long, 1 short: memory or motherboard error. Try to change your memory. If it still doesn't work, we will change the motherboard.

1 long 2 short: monitor or graphics card error.

1 Length 3 is short: keyboard controller error. Check the motherboard.

1 length 9 short: the Flash RAM or EPROM of the motherboard is wrong, and the BIOS is damaged. Try changing the flash memory.

Constant ringing (long sound): The memory module is not tightly inserted or damaged. Reseat the memory module or replace the memory.

AMI BIOS

1 Short: Memory refresh failed. Replace the memory module.

2 short circuit: memory ECC check error. This can be solved by setting the memory ECC check option to disabled in CMOS settings, but the most fundamental solution is to replace the memory.

3 Short: System basic memory check failed. Change your memory.

4 Short: System clock error.

5 short: CPU error.

6 Short: Keyboard controller error.

7 Short: System real mode error, unable to switch to protection mode.

8 Short: Memory error is displayed. There is a problem with the display memory. Try replacing the video card.

9 short: BIOS chip check and error.

1 Multi-space: Memory error. Memory is damaged, just replace it.

1 Long 8 Short: Test error is displayed. The monitor data cable is not inserted correctly or the video card is not inserted firmly.

Phoenix BIOS

1 short: the system starts normally.

1 short 1 short 1 short: system initialization failed.

1 short 1 short 2 short: motherboard error.

1 short 1 short 3 short: CMOS or battery failure.

1short1short4short: rom BIOS check error.

1 short 2 short 1 short: system clock error.

3 short 2 short 4 short: keyboard controller error

3 Short, 3 Short and 4 Short: Memory error is displayed.

3 short, 4 short and 2 short: display error.

4 short 2 short 1 short: clock error.

4 Short 2 Short 2 Short: Shutdown Error

4 short 3 short 1 short: memory error.

4 short 4 short 1 short: serial port error.

4 short, 4 short, 2 short: parallel port error

Comparison table of alarm sound and fault meaning of old prize BIOS

Short system starts normally.

2 Short CMOS settings are incorrect and need to be reset.

1 long 1 short memory or master error, change memory or master.

1 long 2 short display or graphics card error, maybe the graphics card is inserted incorrectly.

1 long 3 short keyboard controller error, major version problem.

1 long 9 short main BIOS FLASH RAM or EPROM error, serious main problem.

Repetitive short response power supply problem

The memory is not tightly inserted or damaged after ringing for a long time.