The screen automatically goes black after the computer is turned on (the screen automatically goes black after the computer is turned on)

What causes a black screen when the computer is turned on?

1. Hardware failure is often an important reason for a black screen on the computer. There are many manifestations of hardware failure, such as the motherboard failing to recognize the hardware device, the memory module being damaged, etc. Damage to the operating system: Abnormal shutdown or operating system abnormalities such as virus infection may cause a black screen as soon as the computer is turned on.

2. The reason for the black screen of the computer monitor is often caused by poor contact of the monitor. Remove the interface from the back of the monitor to the main chassis and clean it. Then try to connect it again. Be careful not to connect the interface backwards. . The reason is that if the memory stick is not in good contact, the screen will go black easily. If the memory stick is not in good contact, the screen will go black.

3. If the computer has a black screen, it may be due to aging hardware, motherboard problems or infection with some kind of virus. Computer fans and other hardware will produce a lot of dust and need to be cleaned regularly. For desktop computers, just remove the chassis cover, remove the hard drive, memory module and other hardware, wipe them, and then reinstall them.

Why does the screen go black after a while after the computer is turned on?

1. The screen goes black after a while after the computer is turned on. There may be the following reasons: The power interface of the monitor is not in good contact. You can try to unplug the power interface and plug it in again. to see if that solves the problem. If the monitor itself is faulty, you can try changing it to another monitor to see if it can work properly.

2. The screen suddenly goes black after a while after the computer is turned on. Cause: Direct shutdown.

3. Poor quality or damaged computer accessories are the main causes of monitor black screen failure. For example, problems with memory, graphics card, motherboard, CPU, etc. may definitely cause a black screen failure.

Repair of inverter black screen fault

The black screen fault during Yaskawa inverter maintenance is usually caused by damage to the inverter power supply voltage due to excessive voltage and internal short circuit of the IGBT. It should be carried out according to the IGBT model. replace. If an internal short circuit of the IGBT is detected, first use a meter to test according to the IGBT circuit diagram, and then start the internal circuit of the module. After detection, the internal fuse fails to blow.

Yaskawa ga700 inverter black screen troubleshooting, after replacing 3 electronic components, the display shows that it starts normally.

Replace the contactor with a new one. When the inverter is powered on, there will normally be a sound of the contactor closing. If there is no such sound, the contactor may be broken. If there is no problem with the contactor, check whether there is a problem with the power module. If the high-voltage power supply LED of the inverter is on, it means that the high-voltage DC power supply is normal.

The question is whether the inverter is running normally after the screen goes black. If it can run normally, it means there is a fault such as poor contact on the control panel. If it cannot operate normally, first check whether the power wiring at the input end of the inverter is loose, etc.; secondly, check whether the voltage of the inverter power supply is normal.

If the spindle is OK, then the smell should come from the inverter.

What is the reason why the screen suddenly goes black after a while after the computer is turned on?

The reason why the screen suddenly goes black after a while after the computer is turned on is: caused by direct shutdown.

The reason why the computer goes black after being turned on for a while is: the computer motherboard is not powered and the computer CPU has poor contact. Computer machines infected with CIH viruses may cause BIOS destructive refreshes, the computer monitor may be powered off, or the monitor data cable may be in poor contact. In addition, the monitor power cord may be easily oxidized and damaged if the computer is used for a long time.

A black screen may occur after the computer is turned on for a while, which may be due to one of the following reasons: Graphics card problem: The graphics card may be faulty, or the driver may not be installed correctly, resulting in a black screen. You can try reinstalling the graphics card driver or replacing the graphics card. Memory issues: The memory may be faulty or not installed correctly, causing a black screen.

What should I do if the screen goes black after a while after the computer is turned on?

1. The screen goes black after a while after the computer is turned on. There may be the following reasons: The monitor power interface is not in good contact. You can try to unplug the power interface and plug it in again. , and see if that solves the problem. If the monitor itself is faulty, you can try changing it to another monitor to see if it can work properly.

2. First, change the monitor and have a look. It is most likely caused by the heat generated by the internal components of the monitor. If it is a standalone graphics card, try switching to a integrated graphics card to eliminate graphics card issues. If possible, try changing the power supply. It may be caused by insufficient power supply.

3. If a black screen still appears, you can remove all components except the CPU, graphics card, and memory module, and then power on and start the computer. If the memory is faulty, there should be an alarm sound. If it is not due to the memory, please change to a normal CPU and start the test again.

4. This situation usually occurs due to the computer memory module, graphics card or system black screen. Solution: Unplug the memory stick and check it, then wipe it with an eraser; if it is a graphics card problem, you need to reinstall the graphics card driver; if there is a problem with the computer system, you can only reinstall the system.

5. When there is a problem that the computer cannot be turned on, you can first use the method of releasing static electricity. The specific operation method is to unplug the power of the host first, and then press the power switch of the host several times. If the above method doesn't work, you can also try opening the host panel. Before operation, please disconnect the power supply of the host.

6. The reasons and solutions for the black screen after the computer is turned on are as follows: The CPU becomes slow and slow for a while because the fan automatically controls the speed. When the temperature is too high, it will speed up. When the temperature reaches the extreme, it will Activate over-temperature protection and shut down.

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