Problem with signal on servo rail

@vib.mad wrote:

I have the same set up on PH1 without problem. I get only signal/power on servo rail Output 1 ..nothing on 2,3 etc...
I run MP 1.3.39 with plane 3.7.1 on Fx 61 with elevon mixing.
- TX is 9XR with Ezuhf chanel 1 => Rud, chanel 2 => ele . Chanel 3 => thro
config MP
elevon output 3
I get signal on radio configuration on MP , sensors are moving fine on pc
same on failsafe radio 1, 2. 3 you can see cursor moving on pc

the PX 2 is powered as followed
USB to PC
Ubec of 5.24 V on aux out 1 (I also tried to power with usb, ubec and power module that I have from ph1not brick)

indeed I tried different servo, different ubec...when I swap servo to output 1 works on 2 not..vise et versa...

I flashed again the PX2, bind again the ezuhf ..nothing I get power on output 2, 3 because I see a little bzzz on servo when I conect them but defintely no signal...

I'm running out of ideas ? I upload couple of photos

PS : I also tried to remove elevon mixing and change to my skywalker set up set up with rud, ele, ail ...same issues no signal on output 2.3,4 only signal on output 1