I'm having a RCB6i Tx which I bought it a month ago.
The 2nd channel is not working, nothing wrong with the cable or the servo, I have tried with many of them.
It was working when I had just bought it.
I have tried the calibration and ID and nothing seems to work.
Please help me out here.

Regards,
Rohith.

Contact rcb they will help you

@Aero Manoj
Yes I did and they suggested calibration but it doesn't seem to work.

Better you send the TX to rcb they will check the problem and make it works

Yes I'll do that. Thank you!

Welcome

Looks like the analog read wire from the ribbon wire is damaged .
Rarest problem cause the TX uses high quality Silicone wires for gimbal connections.
Better to send it back to rcb