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[Klunk]

I have about a dozen of these, and have had no faults on any........until last sunday. ot a boat out that had not been used for about 2 months, all charged up. Turn on rx, turn on tx......orange ligyht flashes very fast. That means its unbound. Rebind.......flashes fast....stops flashing....then it should go to solid light to indicate its bound, but no it goes to fast flash again.  Take battery pack off rx and put new battery pack on, turn on.....solid light shows on rx....still not bound, rebind...seems ok fast flash..off then solid. Take bind plug out......back to fast flash....unbound. give up and use reliable landing craft. That runs out of rx batterypack after 40 mins.

Go out today with said landing craft, fully charged. on the water I noticed that when turning the motor stops. I
t was not doing this yesterday. Bring it in aand check.......guess what......fast flashing light...unbound?????? no the rudder still works! no motor, it just hums at me with the rx ! ok turrn off turn on   motor works, feed in rudder, motor stops and beeping and flashing light.
weird now, take rudder servo offline, turn rx on the tx, motor works, replumb servo in......it goes to beeping and flashing.......turn off then on again minus servo.....beeping and flashing and now will not rebind...................

any ideas as I am out, thats 2 orange dsm2 rx gone bought at 2 different times a couple of months apart.
the tx is a dx7se.
servo is a jr standard

[Tug-Kenny RIP]

You're going to have to analyse this in more detail. Preferably on the bench rather the water.

Each component in the chain will have to be tested separately.

I would personally set another known working R/X with just a different motor and a different servo to ensure it works. Then substitute the Faulty? R/X to run the same motor and servo.  Then test the motor and servo in the boat with the known working R/X, then try your 'suspect'  R/X.

This will tell you how things pan out. I wouldn't guess at this stage as there are too many parameters.

ken