Omnibus F4 Pro V2 build by using Zohd Nano Talon

Hi all master,

I am new for plane and just bought this ZOHD Nano Talon and Omnibus F4 Pro V2 try to build Arduplane, after flashed the Arduplane v3.9.9 and connect all the wiring and follow the instruction and V-Tail Plane configuration, then power up to test all servo are working but the SERVO4_FUNCTION 80 right V-tail is no respond.

I wish some expert here give me a guideline to solve this problem.

Best regards,