Computer alarm has no signal output

Category: Computer/Network>>Hardware

Problem description:

The computer has no signal output, and it beeps after 2 minutes of turning on the computer. What is going on? ah?

Analysis:

Award BIOS:

1 short: The system starts normally.

2 short: General error. Solution: Reset BIOS.

1 long 1 short: RAM or motherboard error.

1 long 2 short: Monitor or graphics card error.

1 long 3 short: keyboard controller error.

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

Constant beeping (long beep): The memory module is not inserted tightly or is damaged.

Keeps ringing: The power supply, monitor and graphics card are not connected properly.

Repeated short beeps: There is a problem with the power supply.

AWI BIOS:

1 short: Memory refresh failed. The solution is to replace the memory module.

2 short: Memory ECC verification error. Solution: Enter CMOS settings and turn off ECC verification.

3 short: System base memory (1st 64KB) check failed.

4 short: The system clock is wrong.

5 short: CPU error.

6 short: Keyboard controller error.

7 short: The system real mode is wrong and cannot be switched to protected mode.

8 short: Display memory error. Note: Graphics card memory is referred to as video memory.

9 short: ROM BIOS checksum error.

1 long 3 short: memory error.

1 long 8 short: Display test errors.

Phoenix BIOS (the previous boss had many POENIX ones, which have now been acquired by AWARD)

1 short: The system starts normally.

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

1 short 1 short 2 short: motherboard error.

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

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

1 short 2 short 1 short: The system clock is wrong.

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: Basic memory address line error.

1 short, 4 short, 2 short: Basic memory verification error.

1 short 4 short 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 (i.e. combination of all sounds starting with 2 short): Basic memory error.

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

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

3 short 1 short 3 short: Main interrupt processing register error.

3 short 1 short 4 short: Slave interrupt processing register error.

3 short 2 short 4 short: keyboard controller error.

3 short 3 short 4 short: Display card memory error.

3 short 4 short 2 short: Display error.

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

4 short, 2 short, 1 short: The clock is wrong.

4 short 2 short 2 short: shutdown error.

4 short, 2 short, 3 short: Gate A20 is wrong.

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 1 short: Serial port error.

4 short 4 short 2 short: Parallel port error.

4 short 4 short 3 short: Digital coprocessor error.

Compatible with BIOS:

1 short: The system is normal.

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

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

1 long 1 short: motherboard error.

1 long 2 short: graphics card error.

1 short 1 short 1 short: Power supply error.

3 long and 1 short: keyboard error.