Sony rear projection TV problem

[dtong_ck]

Hi everyone:
My 10 years old Sony rear projection TV KP-46S15 recently has some white lines on the screen and the lines are flickering and sometime those on the top portion of the screen disappear and come back Is there any adjustment that can get rid of it? Thanks in advance. Please see pictures from the links.

http://pg.photos.yahoo.com/ph/dtong_ck/album?.dir=903b&.src=ph&store=&prodid=&.done=http%3a//photos.yahoo.com/ph//my_photos