I brought my amp to service after receiving the notification for the Technical Bulletin 059 from line6. I brought it to King Amplification of Santa Clara, California, and when I went in to try the amp again, the topology 3 of the amp didn't work anymore.
They didn't tell me anything about it before I went in and I'm pretty sure they didn't even bother to test the amp when they put it together after the service... they asked me money to diagnose the problem on the spot (you need very, very big balls to ask money to diagnose an amp you just broke).
Anyways, anybody knows if servicing the amp could lead to that kind of problem, or what could be the issue? A loose cable, a valve that came off the socket... anything else?
If it's something easy to fix I would like to do it myself (I'm an engineer, although I different kind of engineer...).