Hello RCA guys - I'm trying to solve one of the weirdest problems I've seen in this chassis yet. Your advice is appreciated.
Everything works fine but no audio of any kind. I know you will say do tuner grounds and replace eeprom....I did all that. In fact I did much more than that: replaced mute transistor Q1903 (I grounded the Emitter on the previous one without help), went into SETUP and switched speakers to ON (they were in OFF position), replaced audio output chip just in case (chip is getting B+), tried new speakers, pin 29 of micro is low so I know TV is not in MUTE condition, checked for bad joints everywhere. I do not have schematic and the only last option is to replace LA7610. Has anyone ever had this chip cause no audio ? Is it possible I overlooked one single connection in the tuner which may cause loss of audio (which I doubt) ? Thank you.