Soundlink Revolve won't do anything in Portable

My Soundlink Revolve won't do anything.  Battery charge must have been lost while I was away for a few days.  None of the recommended options I have seen seem to fit the bill in this instance so cannot perform factory reset, etc.  It looks like it is charging (orange pulsing light) but will not connect by bluetooth or directly wired.  My computer recognises it but cannot play through it.  Thought it might be a software problem but the Bose app will not install.  In short, not having a good day!  Any suggestions?