Robd

I have an older T8SG series transmitter that has been in storage for a few years. I was planning to put it back into service but for some reason I cannot get Ch1 and Ch2 to operate to full travel. Right aileron and Up elevator only move to about the one third point. I have followed the ATV reset procedure as well as insured that 2nd ATV settings are set to max. The self test does move the servos over the entire range so the problem is definately with the transmitter.
Can anyone suggest anything else I could try and/or a service centre that can still service these radios.
Thanks for any help you can provide..
-Rob-