@greatunclebill, if it was obvious, I would not waste time asking. But it was worth a try. Finally was able to make appointment, and in the process of driving two hours to first have the dme tech inspect and hopefully approve of a return. Not always as smooth as one would think on the surface. As I ...

Hi Juaquin, Thanks for the suggestions. I mentioned that I can get it on by pressing combinations for a long length of time, and the adapter always has a solid green light, but not the unit itself, which is a very brief flicker until I hit the right combo. Thinking it best to try to facilitate retur...

Yeah, retired EE. I pretty much know the rudimentary troubleshooting steps. Looking for more device and some specific experience. Thanks

Well, After about a year and a half in, finally starting to tolerate mask. Unfortunately, problems not resolved much -- frustrating, as AHI looks great since day 1 (Average 1.8). Anyways, main reason posting is... Friday, the machine would not turn on. Troubleshooted, and the green light is on the a...