I bought my laptop a couple of years ago, and it worked fine until recently. Now my eyes quickly get strained when I work on the laptop. I noticed that when I move its lid or even touch it, the display glimmers a bit, i.e., its colors slightly but quickly pulsate, somewhat changing their shades. The same happens, albeit to even a lesser extent, when the laptop is physically disturbed in any way (e.g., moved, touched, slightly shaken because of typing, etc.), even when I just type on it. The effect is too small to distract me, but apparently is what makes my eyes strained. At least I do not get any eye fatigue when I work on other computers, and I did not get any eye fatigue when I worked on that laptop before its display started to glimmer.
When the laptop is absolutely still (i.e., standing on a table and not touched), its display does not glimmer. When the laptop is still, and I move my head to change the angle of view, I see no such fluctuations of color shades.
The model is Acer TravelMate P249, and the system is Windows 7 Pro.
Is there anything I can do to try to fix this at home, or should I just bring the laptop to a repair service? What is the most probable cause of the problem?