hello. i currently own an x12s and a x20rs. no plans for the x12s as i bought on a whim then read up on the x20rs. then subsequently bought the x20. but, i have a stuck button on the x12s. how would one figure out what button it is? can i hook up to the computer, would it tell me? The radio works fine and has 2 receivers with it. want to make sure it works then sell it to recoup some of what im into it. thanks in advance. oh btw it has open tx on it.