TV beovision lx 4500 -1989 some help please thanks

[Tchotto]

hello !
verticality of the image on the screen is only +/- 18cm high instead of +/- 35 . The B-O ( bang-olufsen maker ) told me the " module 4 " has a problem ; Cost ? +/- 300 ˜!( = +/- 300 USD ! ) maybe it's a question of changing some capacitor ( condensator ) ?! Any advise or schem is welcome ! Thanks !
Enjoy your week-end !
ps: Idon't think it's worth that investment on a 16 years old device ! A pity because it was a good tv set and I wanted tokeep it for another year or two waiting for better lcd tv ( fifth generation next year ! -better and cheaper ! ) . !