[rc_farmer]

Dwayne, you are using the RD8000 not the RDS8000, thus you will not have any binding functions between the rx/tx. It is bound by the crystals.

What basic voltage are you using to power the MFU, i.e. 7.4 or 9.6 You can safely run an MFU up to 9.6 although 11.1 will work, the MFU is sensistive to that high voltage. (a fully charged 11.1 is 12.+ voltage) The MFU will then drop the voltage down for the RX.

1. Remove all the connections to the RX
2. Get an external power source for the RX and plug it into the RX
(You can safely put 6.0v into the RX if you do not know the correct input
......most older TX run off between 4.0-6.0 volts)
3. Plug an extra servo into the any port on the RX
4. Turn radio on then RX and watch for any motion at all

***if you get any motion from the RX, then the RX/TX is talking
1. plug one item in at a time, starting with the MFU

***if you do not get any motion from the RX, turn the RX, disconnect the battery, and turn off the radio.

1. with the radio off, plug the extra servo into the RX and then the extra power source.....switch on the power to the RX and listen/watch for any motion. If you get any motion or noise, then you RX is good but not talking to you radio.

Also, to piggyback off Mario, DO NOT run dual voltage to your RX. You can, however, run dual power so you can power your individual components. You have to remove the positive power lead going to the rx from the extra power source. All that component will need is the signal from the RX

Hope this helps some.