tested

I have been using my pod hd 500 almost every day for a year now without any problems at all. i have recorded with mic and xlr cables, used the out balanced to my flextone III amp and i am pretty satisfied so far. but yesterday it started to sound really weird at the same time i was playing. its like an noisy, clicking, crappy sound and i cant get it back the way i it was. i have reset it back to factory settings, global settings, re-installed all line 6 software', making new presents, downloaded others, switching the output modes between studio/direct and the power amp selections, tested the pod in another amp and computer. but nothing works so i need some help :)