Unpack the chassis, pull off the mainboard battery and try to install it again after a rest. For more computer knowledge, you can go to the installer's website
The monitor is not responding. It may be a problem with the memory module or the motherboard.Remove the memory module from the power supply and try again to clean the dust, or use the removal method to unplug the external devices one by one to see if there is any improvement.If the above operation fails, please consider taking it to the maintenance point for a comprehensive hardware inspection and repair
It may be that there is a fault when the system is started or the connection cable of the display screen is loose.You can try restarting the computer and pressing the power button to force it to shut down and then turn it on again, while ensuring that all connections are secure.If the problem persists, please consider contacting Dell Customer Service for professional help
The display of your Dell computer does not move after it is turned on. It may be a screen initialization problem or a graphics card driver error.Try to enter the safe mode. If possible, try to update or reinstall the graphics card driver.If it still fails, you may need to check the BIOS settings or find a professional to check the hardware
