My LCD is strange

For the past week or so My LCD had this strange problem: the video lines were shifted random amounts. Near the top of the monitor there was a place with so much shifting that it looked like the picture was bent. The middle of the monitor flickered clumsily if you displayed a dot pattern.

So today I decided to go trouble shooting. I took the monitor downstairs connected it to another computer. When I turned it on, there was no problem. I thought, Ahh-ha, its My graphics card, not My monitor. So I brought it back upstairs, and plugged it back in. The problem had gone away. Computerized things can be very odd at times.