Samsung CS761BV Blank Screen???

[Eddie]

Hi!

Would anybody be able to help me:

TV as described above - the set goes on and on screen display functions 100%, but no picture on sound - not even blue screen displays - only on screen display.

Tuning is fine as the set occasionally clicks in with sound and picture.

Would this be the Micro - controller or something else?

Anybody with a diagram for a similiar chassis? I have searched myself blu in the face!!