what if I the red yellow and white wires and connect the tvs???
I have no idea what you are referring to except maybe you are referring to RCA connectors ?? Sound & Picture input ?
Most TV's have what is known as a SCART input which, when a suitable SCART connected device is connected, allows the TV to take signals from that device rather than the TV Tuner. Sometimes the action is automatic and others requires manual intervention switching to A/V mode.
If you have a working DVD player you could try using that to see if you get any response.
do you get any indications that the set is working at all ? Digital readout, power on lamp ? Lack of sound gives an indication that the tuner circuitry is not functioning but tells us little more than we already know. In the days when I repaired TV's I had a second set that I plugged in to "No Sound/ No display" sets because I would frequently find that a fault prevented sound and vision. the second set would show me if the tuner and decoder sections were working pointing the way for analysis of the problem.