Not Recieving TX commands any more?

[Juggmeister]

Last night, in preparation for adding 360 servo rotation I removed the turret & upper hull assembly completely. I replaced the turret ring then reconnected everything. Turned on the TX and then switched on the tank. The led on the RX lights up and I get the message "system ready" as usual. However no input from the TX is being received by the board. I tried recalibration, the board does not seem to be receiving signals. I checked the operation of the receiver by placing it in another tank, works fine. I am using a copy of the SD card, having kept the original as a backup. I briefly tried the original in the board and it seemed to work for a short while. Now, neither cards seem to work.
The system all lights up.
Can't think of anything else to try.
Oh, I did post about adding a helicopter gyro, and before any of you comment on that being the reason I haven't tried it yet because I have had no advice on how to connect it and I can't afford to screw up the board by messing with it

Any ideas?

[Juggmeister]

Oh, forgot to add it's an IBU2U full option

[Juggmeister]

Turns out it is the receiver not functioning on I bus.

[Jimster]

Is it an S-bus receiver? Plugged into the correct place and properly bound to the transmitter?

[Juggmeister]

New FS-iA10B receiver plugged in and all is good. The old receiver works fine with individual servo cables but doesn't function on I Bus anymore.

[Biasphere1]

How did this end up mate.
Did you have to set the TX output to IBUS ?
PPM / I-Bus Receiver setup
Both PPM and FlySky I-Bus RX modes are supported by setting the following lines
RadioType=0;0=PPM, 1=Serial IBus
IBusChannels=6;Number of channels in use (for I-Bus only 4..10)
It’s mandatory to set the correct number of channels you are using from TX otherwise the calibration
process will fail.