hello to you, regarding your tv the only circuits available are the signals panel(s)
we are service agents for lg, sharp, tosh and hitachi and others and have direct internet accounts for all manualls and none of them include diagrams for the any of the screen drive pcb.s, ie. z sus, y sus y drive or even the psu
we do extensive work on these boards but often the components are not available to repair the boards anyway
BUT who manufactured the screen itself, then i may be able to help you if yourre in the uk