Laptop black screen after standby and cannot be turned on

Repair of inverter black screen fault

1. The black screen fault during Yaskawa inverter maintenance is usually caused by excessive damage to the inverter power supply voltage and internal damage to the IGBT. If it is caused by a short circuit, replace it according to the IGBT model. 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.

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

3. 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.

4. 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.

Laptop computer has a black screen and cannot be turned on. How to solve the problem?

The power adapter of the notebook is damaged and cannot be powered on, or the battery of the notebook is out of power, causing the computer to fail to turn on and the screen is black. Solution: Replace the power adapter, or fully charge the battery.

The solution to the sudden black screen of the laptop and unable to turn on is as follows: dust affects heat dissipation, open the case and remove the dust. A hair dryer works great. The CPU is overheated. Remove the CPU and apply a thin layer of silicone on it. Memory failure, replace the memory or memory slot.

The ways to solve the problem of black screen and unresponsiveness when turning on a laptop include checking for power issues, checking whether it has entered sleep mode, checking for system issues, and checking the graphics card. Check for power issues. Old laptops are prone to running out of power when starting up due to battery aging and other reasons. Connect the power supply to charge, and then restart it after ten minutes.

Solution 1 for laptop black screen and unable to turn on: caused by battery static electricity. Check whether the laptop's battery is removable. Remove the battery and connect the power interface card separately. Try turning it on again. Because battery static electricity can cause problems with the motherboard and the computer cannot be turned on.

What to do if the laptop screen is black and cannot be woken up after it is in standby

1. Press any key on the keyboard or move the mouse. These methods are used to wake up the computer in a sleeping state. Generally, the computer can be woken up. desktop.

2. Solution to the problem that the notebook screen is black and cannot be woken up: First restart the computer, then click the computer start button and click Settings after restarting. Click System, then click Power & Sleep in the left column. Set the screen off time to Never, then click Other power settings under Related settings on the right.

3. If there is no external power supply; the battery may be out of power, just connect the external power supply. If it still cannot wake up after connecting to external power supply, you can remove the battery. Then connect the external power supply to turn it on.

4. After the computer is on standby, the screen is black and the screen cannot be awakened. First of all, if the computer is on standby for a long time, the screen is black and cannot be activated. No matter what shortcut keys we press, it will not help. So here we can shut down and restart the computer. If the shortcut cannot be used, The only way to restart the computer is to press the power switch to force it to shut down and restart.

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