If I understand correctly, you tried another car with your transmitter, not a different receiver in your car?

Unplug the transponder and servo to eliminate any possible short (unlikely, but can happen).

Is your esc providing power to the receiver? Check the wires in the esc servo plug, make sure they or the plug didn’t pull part way out. Try a receiver battery (pull the esc plug first to be safe), and/or use a voltmeter on the esc servo plug to see if it’s providing anything (should be 5~6 volts dc across red & black).

Basically check all the simple stuff first before giving up on the rx.

If it doesn’t power up then it may not be promising. Probably either KO service or a new receiver it seems to me.