Subtle vertical lines on my LCD monitor

[BRZY]

My computer was in it's usual sleep mode and when the display turned back on, subtle lines had appeared. Currently It doesn't interfere with anything, however, I'm worried that it could be a problem.

The monitor is an LG. Model W2053TQV.

 

[MagicPants]

Did they persist after you tried rebooting? Sounds more like a video card issue.

 

[BRZY]

I haven't rebooted it yet, but decided to let it sleep again whilst I took care of chores. I turned off the monitor first though (I doubt as to whether or not it made a difference). However I turned on the monitor again and then hit enter. When it came back the lines were gone.