HI
I have been given a philips 23pf9956/79 and the problem is that when you switch it on it becomes a 19" instead of a 23" then after 5 minutes the centre of the top part of the screen starts to quiver then a couple of second their is a 2" black line from top of screen to bottom of screen then after a few seconds lines apear running down from top to bottom of screen when i change to channel 5 which is not tuned then still get 19" screen then a couple of seconds a full screen 23" then when i change back to channel 2 still 19" picture.
Can some body please tell me what the problem could be
