reading through the listed problems a lot seem to relate to your particular brand name of which i am not familar with, most pcb failures are due to a relay component which is probably available from the likes of Maplin and soldered in by the likes of your local tv repair guy, also remember that prior to pcb s that these units were run on stats so any good electrician should be able to convert it to the old fashioned system and get rid of the PCB board altogether
keymatic, July 2012