Television and Home Theater

HELLO I HAVE RED WAVY LINES ON THE SCREEN OF THIS TV.  THEY STARTED ABOUT 10 MONTHS AGO BUT WOULD SNAP BACK TO GOOD PICTURE. HOWEVER NOW THE TV WILL NO SNAP BACK AND THE WAVY RED LINES ARE THERE ALL THE TIME AND DISTORT THE PICTURE CAN YOU TELL ME THE PROBLEM AND THE PART AND LOCATION IN THE TV TO FIX THIS PROBLEM,

THANKS DAN

I have a mitsubishi ws-a48 hi-def ready tv.  I just noticed that my screen size is larger than the tv.  I have a ps3 and the scores in the corners are cut off.   Once i noticed that is payed attention and realize that it is on my hd-dtv reciever and not just the ps3.  I also tried other tv's and they work fine.  Is there a way to calibrate the size or adjust it.  It is like it is a zoom a little all the time with all inputs but it is set on standard format.

model # 55r-wp4h. man. date apr 2001. the picture is distorted and the colors are off. but when i hit it in the top right hand side the color returns too normal but eventually returns to the original state. sound quality is normal.