Casio TV-570 Viewing Angle Problem

[PortableTV]

I picked up this cute little TV with a bummer of a problem...

When I adjust the "Bright" pot I cannot get any clear image when viewed straight on. I can only see a clear image when looking down at the screen from a steep angle above.

Is this a failure of the crystals in the LCD? A problem with the pot circuit? Is there some polarizing film on top of the LCD that perhaps was installed wrong?