I love this device, I have two of them. One seems to have failed today. I was listening to it yesterday with it plugged into a USB power supply and a Chromecast for it's input. Worked great. Turned it off, Today I plugged it back in, the yellow charging led came on but it will not power up. Thinking the battery died, I waited and soon the charging led went out as it is supposed to when fully charged.
I still will not power up. No pleasant sound of the startup. Is there some magic key sequence to reset the device? or is it replacement time. I bought these in November so they are still under warrantee.