Hi! I wrote this to Facebook group also.. I have some sort of problem with new Helix LT. I don't remember the serial number of the unit. So: I start the LT and I play and edit the sounds normally. Then all of a sudden sound to the speakers stops completely. I check that everything should be ok, but no signal comes in to the LT. If I put tuner on, no input signal comes there. I tried also to restart LT several times. Is the unit faulty? That has happened few times before, and after a while sounds come back normally.. I checked also my guitar and it's working too. Problem occurs usually once when I start the LT and then I can play long time. I have to wait about 5-15 minutes and then sounds come back with like "popping" sound. I opened a ticket, but can I try anything myself?