Thanks for the advice everyone. I have tried several cables and a wireless Nu-X wireless. I do not use my Helix on carpet either. I opened the unit up and it is virtually dust free and there are no obvious visible issues. The unit will work perfectly for the first set, about 60-75 minutes. Then, it’s hit or miss. The unit starts cutting out then the input drops. After a few hours, it will come back. It’s extremely frustrating and puzzling. The Local Helix authorized repair facility can’t duplicate. The only difference is, they have the unit on, but they are not playing through it for extended time, as if playing at a gig. So they cannot duplicate. Someone has to have experienced this. Thanks for any suggestions.