Thanks for all the different replies. Something to think about and consider.

Does a mouthpiece from the dentist prevent sleep apnea or just snoring?

I understand most will refurbish them for a minimal fee. I believe the DME has to return them however and that seems a problem for you. Contact manufacturer anyway and see what they say. There are companies that do repairs for about $200. Google and see.

Thanks, I got the sleepy head software. Isn't there a read only one too? I guess that is where I need to find a contact for Respironics and download link?

I used to use Respironics software downloaded from this site for the M series bipap. Is it still available and what is download site?