My computer had to be restarted many times before it booted up properly

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The graphics card has the greatest chance of having problems, and the memory is also tested.

It should be that there is a defect in the motherboard or CPU, anything is possible, and it is recommended to figure out which aspect of the problem to solve

Whether you are an LCD or a monitor with a big head, it should be LCD, it is basically a cable problem, and the lightest is the poor contact of the cable.

Compare it for yourself :

1 Short: The system starts normally.

2 Short: Regular error. Workaround: Reset the BIOS.

1 long and 1 short: There is an error with the RAM or motherboard.

1 long and 2 short: The display or graphics card is wrong.

1 long and 3 short: The keyboard controller is wrong.

1 Long 9 Short: Motherboard Flash RAM or EPROM error, BIOS corruption.

Constant ringing (long sound): The memory module is not plugged in tightly or is damaged.

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

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

No sound and no display: There is a problem with the power supply.

awi bios：

1 Short: The memory refresh failed. To solve the problem, replace the memory module.

2 Short: The memory ECC verification error is incorrect. Solution: Go to CMOS settings and turn ECC verification off.

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

4 Short: The system clock is wrong.

5 Short: CPU error.

6 Short: Keyboard controller error.

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

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

9 Short: ROM BIOS check and error.

1 long and 3 short: memory error.

1 long and 8 short: A test error is displayed.

phoenix bios

1 Short: The system starts up 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 incorrect.

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, 2 short: The basic memory verification is incorrect.

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. a combination of all sounds that start as 2 short): Basic memory error.

3 Short 1 Short 1 Short: Error from DMA register.

3 Short 1 Short 2 Short: The main DMA register is wrong.

3 Short 1 Short 3 Short: The main interrupt processing register is incorrect.

3 Short 1 Short 4 Short: Handle register errors from interrupts.

3 Short 2 Short 4 Short: Keyboard controller error.

3 Short 3 Short 4 Short: The display card memory is wrong.

3 Short 4 Short 2 Short: Error is displayed.

It takes multiple times to turn on the power switch of the computer to turn it on, and there are generally two problems:

1. There is a problem with the PG (power good, good power supply) circuit of the host power supply;

If the CPU can't get the PG signal, it won't send a boot command, although the CPU fan and graphics card fan are running normally.

2. If there is a problem with the starting circuit on the motherboard, it will also lead to a failure to start smoothly at one time, and the main fault part is the starting resistor or starting capacitor;

The most effective way to judge the above two items is:

a. After normal shutdown, cut off the power supply of the host, if the fault phenomenon is still after waiting for 8 hours, then it may be the resistance value in Article 1 or Article 2;

b. Do not cut off the power supply after shutting down, wait for 8 hours and then reboot, if it can be turned on smoothly, it can be confirmed that the starting capacitance on the motherboard in Article 2 is out of capacitance;