Originally Posted by Haadkoe

I can only assume that the servo shorted internally and sent 3s power through all of the grounds.

The black wire insulation on the servo's negative battery lead melted, the brown wire that goes from servo to rx melted as well, and the negative pin on the 3s balance port is all scorched and melted now.

As of now, esc wont power up at all, esc fan dead, rx won't power up, and servo is presumed dead too.

My rx is rated for up to 35v input, and had full 5s voltage going to the SPC port for voltage telemetry. The esc fan was plugged into the rx batt port. Steering servo signal wire to CH1, ESC signal to CH2. Servo power direct to 3s lipo balance lead, red to positive black to negative, polarity confirmed on a meter.

The power coming out of the esc signal connectors center pin provides voltage to the batt and ch1-4 ports on rx. 5s voltage going to spc port powers rx and provides voltage for telemetry.

It was hooked up properly, as best as I can tell.