I bought a Line 6 Spider 3 amp head a while back and it has currently been switching tones automatically on me during shows. I do not know what is causing it or what I can do to fix it. I have tried to factory reset and everything, but it still does it. I am not sure if my warranty is still in effect either. Thanks for the help.
If the reset does not fix the problem, you will need to take it to an authorized service center for repair:
the warranty is for one year from the date of purchase if you bought it new from an authorized dealer.