Wiring schematic for a RCA model F31672ET television

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I will need the model number of your set to assist. also some of the newer sets dont have schematics since they are designed for board replacement repairs only so schematics arent released for most of those models.

Not possible as model listed is composite video only with two additional inputs for audio--no way I know you could do this.

It sounds like your power supply board has gone out. This is a fairly common issue, and the repair will cost you around 175-300 dollars at a repair shop.

Check with the channel 00 good luck

Clip R1915 and the sound will return. But you still have a Tuner to rework. See my solution with the power problem. just before this answer!

Yes!

use tv/video switch

Find Capacitor C4127, this is a startup cap and will fail. Then check C4709, C4105[this one almost always goes bad] and C4404. These are good starting points. You will have to resolder the Tuner as it will coorupt your eeprom and can create a dead set. And inspect the pins a Regulater T4101 I beleive, for busted grounds. If this will not start the set you will need a new eeprom or the T4101 Regulator. The regulatore rarely goes bad in this TV!