I am getting the rxloss flag "no valid receiver signal". My tx is showing good signal and on betaflight I see the inputs when i move the sticks. I have my arm switch set correctly and can also see this move in betaflight.

Does this mean it's the signal from my Rx to the flight controller that isn't working or would that not show the inputs on betaflight?

Its on a mobula 6 so is I can't replace the receiver (frsky)as it's all built in.

I've watched hours of videos on recover problems and Rxloss but can't find anyone who has inputs but still gets rxloss.

Any ideas that can save quad?

Thanks

In the Receiver tab, when your throttle stick is at the lowest position (zero throttle), what number is shown next to the throttle bar?

885, if I throttle up it gives me another arm flag for the throttle as expected.

Thanks

If the throttle value is <= 885 or >=2115 you will get the RXLOSS flag because OpenTX isn't expecting stick values to be outside of the 886-2115 range. Yours is right on that limit at 885. You therefore need to adjust the stick endpoints. They need to read from 1000 to 2000, with 1500 at the mid-point.

Oscar's article below shows you how to calibrate the end and mid points...

https://oscarliang.com/adjust-tx-channel-mid-end-point

Or if you prefer a video on the same then have a watch of the following...

Thanks for the help, I'll give that a try. Just managed to get it spinning by not having the throttle all the way down so looks like that will work.