Changing your computer's refresh rate might fix the horizontal lines on the screen. Restarting both your monitor and computer can solve many screen issues, including horizontal lines.

How Do I Fix Vertical Lines on My Computer Screen? There are several possible causes for vertical lines on a monitor, so there's an equal number of solutions to try.

Some of the computer's power might have been transmitting to the monitor, causing it to short out. Reconnect everything and turn the system back on to see if the lines are gone.

If you see black or colored horizontal or vertical lines on your Lenovo, HP, Dell, etc. laptop screen or desktop monitor, the problem could be the hardware or the software. Learn how to fix such ...

If a computer monitor is dying, it displays signs or symptoms like Dim colors, Screen flickering, Color distortion, Dead pixels, Backlight bleeding, etc.

Monitor flickering, generally speaking, is caused by a disconnect between your computer's display drivers and your physical monitor.