The computer turns on and the screen doesn't show anything

 Reference content 1:

1. If something goes wrong, analyze it from the outside in. first of all to see if it is a simple display problem , plug in the power supply of the display separately , and see if there is a response . If only the display is broken, you can change the display.

2. If there is no problem with the display, check the cable to see if it is connected well, if it is broken, change the cable.

3. There is no problem with the cable, just open the case and carefully take out the memory stick with your hand ( note : do not touch the motherboard , do n't touch the gold hand bar , so as not to get hurt ) , when you take it , just press and hold the card on both sides , and the memory stick will automatically come out . After taking it out, it is best to use an eraser to wipe the gold hand strip to remove the dust.

 Reference content 2:

First, the external display is confirmed, see if the external screen has this situation, if the external display is normal, you can judge that the screen part of the failure is likely, it is recommended to go to the after-sales specific test.

Second, if the external display is also problematic, you can troubleshoot it by following the steps below:

1. In order to ensure that the system is free of any viruses and rogue software interference, the computer is fully disinfected.

 Reference content 3:

1. Whether the computer display and the host are normally connected to the power supply, whether the power-on indicator of the power supply is on, whether the power indicator is not lit when the display is not powered on, or whether the power-on power indicator is on but there is no signal or the screen displays "no sighal".

2. Computer self-test, when the screen is black, there is a horizontal bar flashing at the top left of the screen, and the computer black screen means that no program is started at this time.

 3. Reasons for hardware and software.

 Reference content 4:

 Method 1

1. The first thing you need to check if the screen is bad is whether the switch of the display is on, find the switch and press it, if the switch is not lit, it means that there is a problem with the switch, if the switch keeps flashing, it means that there is a problem with the system.

 Method 2

 Reference content 5:

1. If the display is powered on but the display shows no signal, turn off (if the short press on the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off, open the case, replug and unplug the memory stick, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn on after installation.

2. If the above operations are invalid, turn off the power and turn on the case, reinsert and remove the graphics card, and plug in the data cable between the display and the graphics card. If it still doesn't work, then consider the graphics card damaged, then replace it with a new one.