mpg video: only the sound comes, no view in X41

[omero72]

hello

I've been using an X41 for several months and so far no problem except this strange phenomenon:

when I play a video, whatever it is, a mpg or dvd files, or whichever program I use whether Windows Media player or VLC player, only the sound comes, but no view.

That X41 's got the mobile Intel 915GM/GMS, 910 GML drivers installed and I've installed K-Codecs too. Still no view while watching a video. Really strange, huh?

Am I missing somethin very basic, what's missing here? I have no clues.