Wait till it fails, assuming it wont fail while you are flying?
Aside from batteries, I have seen pots and wires going fail from mechanical cycling, pots sometimes start glitching but broken wires in all cases killing that axis of control, FWIW
Back in another life i had access to world class electronic assemblers, I would have her take my new TX apart and check for solder balls (found some over the years) and reflow any sketchy solder joints
Last edited by mr_matt; 08-07-2017 at 07:04 AM.