What's the matter with no signal on the computer boot monitor?

1 short: the system starts normally.

2 short: general error. Solution: Reset the BIOS.

1 is long and 1 is short: there is an error in RAM or motherboard.

1 is long and 2 is short: the monitor or display card is wrong.

1 long and 3 short: keyboard controller error.

1 is long and 9 is short: the Flash RAM or EPROM of the motherboard is wrong and the BIOS is damaged.

continuous ringing (long sound): the memory module is not tightly inserted or damaged.

non-stop ringing: the power supply and monitor are not connected to the graphics card.

repeated short sound: there is something wrong with the power supply.

no sound and no display: there is something wrong with the power supply.

awibios:

1 short: memory refresh failed. Solution: Replace the memory module.

2 short: memory ECC check error. Solution: Enter the CMOS setting and turn off the ECC check.

3 short: the system basic memory (the first 64KB) failed to be checked.

4 short: system clock error.

5 short: CPU error.

6 short: keyboard controller error.

7 short: the real mode of the system is wrong, and it cannot be switched to the protection mode.

8 Short: Memory error is displayed. Note: The memory of graphics card is referred to as video memory.

9 short: ROM BIOS check and error.

1 is long and 3 is short: memory error.

1 long and 8 short: test error is displayed.

Phoenix BIOS:

1 short: the system started normally.

1 short 1 short 1 short: initialization of system power-on self-test failed.

1 short 1 short 2 short: motherboard error.

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

1 short, 1 short and 4 short: ROM BIOS verification failed.

1 short 2 short 1 short: system clock error.

1 short 2 short 2 short: DMA initialization failed.

1 short 2 short 3 short: DMA page register error.

1 short 3 short 1 short: RAM refresh error.

1 short 3 short 2 short: basic memory error.

1 short 3 short 3 short: basic memory error.

1 short 4 short 1 short: the basic memory address line is wrong.

1 short 4 short 2 short: basic memory check error.

1 short, 4 short and 3 short: EISA sequencer error.

1 short 4 short 4 short: EASA NMI port error.

2 short 1 short 2 short to 2 short 4 short 4 short (that is, the combination of all sounds starting with 2 short): basic memory error.

3 short 1 short 1 short: error from DMA register.

3 short 1 short 2 short: main DMA register error.

3 short, 1 short and 3 short: error in the main interrupt handling register.

3 short, 1 short and 4 short: register error is handled from interrupt.

3 short 2 short 4 short: keyboard controller error.

3 short, 3 short and 4 short: memory error in the display card.

3 short 4 short 2 short: display error.

3 short, 4 short, 3 short: No display ROM was found.

4 short 2 short 1 short: clock error.

4 short 2 short 2 short: shutdown error.

4 short 2 short 3 short: A2 gate error.

4 short 2 short 4 short: protection mode interrupt error.

4 short 3 short 1 short: memory error.

4 short 3 short 3 short: Clock 2 is wrong.

4 short 3 short 4 short: real-time clock error.

4 short, 4 short and 1 short: serial port error.

4 short 4 short 2 short: parallel port error.

4 short 4 short 3 short: digital coprocessor error.

compatible BIOS:

1 short: the system is normal.

2 short: system power-on self-test (POST) failed.

1 Length: Power supply error. If there is no display, it is a display card error.

1 is long and 1 is short: motherboard error.

1 long and 2 short: graphics card error.

1 short 1 short 1 short: power supply error.

3 long and 1 short: keyboard error.