My monitor has recently started showing vertical lines in the graphics and pictures. It doesn't seem to have any effect on the typewritten words until the font is large or bold. I have tried adjusting the resolution setting but it hasn't helped. The monitor is a Samsung Syncmaster 170MP Thanks for any info

Do you have access to another monitor to see if same thing would happen on another monitor.

Or try to put this monitor on another computer to see if issue still exists.

And/or do both of above

With trying these ideas, it can help narrow down or pinpoint issue