Hi all! I know nothing about tv repair, but figured I'd ask here for help before getting reamed for my lack of knowledge. I have had a great Sony 27XBR51, but recently there was a picture problem and it's nto going away. The picture now only occupies the bottom 3/4 of the screen, with the top black. Picture is distorted accordingly. There is no vertical hold adjustment on the set, which was my first response. Any ideas? Will this be a fortune to fix? Any reputable Sony repair people in LA area?