There is no vertical line on the computer display. The HD line has not been used for a while. What is the reason?

  

The computer display has a vertical line and the HD line has not been used for a while. What is the reason?



It may be that you have a problem with the line. Or Monitor
has a problem, or graphic card
has a problem, you said that you move the line just fine, it should be bad contact, change the line to see, change it, change Graphics card
, graphics card does not work, change display
, always find the problem there,






Generally, it is a problem with the graphics card. See if the interface and connection are normal. After the exclusion, it is a hardware problem.






The problem with the graphics card, check it, Not checking the monitor!




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