RSX is dead because you have removed TP66 from the board and the trace runs thru that to get to the MCU board. You'll need to solder a jumper wire from the RSX POT lead to the MCU board solder joint just above where TP66 was located. It's the 4th solder joint from the corner there.
Also, you were not soldering onto TP65, that is TP16. TP65 is the one to the right of the TP65 marking, the one under the antenna.