I use our M1 to monitor audio of a remote server via the composite input. There is no video input connected. The iphone app and windows 10 APP can connect to the sligbox and stream only the audio. The Sllingplayer desktop program (which is much easier for my office PC's) cant connect because of "no video signal". I can't email support about this since it's out of warranty. Any thoughts? Anyone in tech support read these?