Unplugging the individual servos in every possible permutation made no change. Ieven hung the antenna wires outside the aircraft where I could physically see them during the entire range check. I also bypassed the regulator and switch harness.

I just found out that my radio is part of last year's recall. I'm a little shocked as it was issuedlastNovember, but Iguess the radio I bought had been sitting on the shelves for some time and the shop staff was eithertoo ignorant or lazy to check their inventory when they no doubt received the recall last year. Just my luck...