RE: DX7 and AR7000 won't bind
Make sure you have the "BIND" plug is in the "BATTERY" slot. Any other slot on the receiver will not work for binding the TX to the RX. If you do it right you will see a series of flashes on the receiver RED LED , that is the "GUID" identififer being sent to the RX. After that is done remove the "BIND PLUG" and turn on the receiver. The receiver should then light the RX RED LED light and ready to be set up for your plane. How do I know well, I did the same mistake when I got my DX 7.
John F. Clarke
AMA 9473