My panasonic all of a sudden started showing "running snow"?

There are white dots that obstruct the picture very badly. The dots are in groups and the screen as a whole seems to be running diagonally. It just started about a month or so ago and I have had the player for about 5 years. It has been sitting inthe same spot undisturbed for a while, so it hasn't been dropped. I have tried it on more than one tv directly connected and it is the same picture.