This is the exact same product I have. Used it for a year and a half. Woke up this morning and it is stuck on the start up screen playing that same stupid sound. Looks like there’s no support for this anymore… I think this is the way they’re forcing people to buy newer product just like apple does.
The power supply is critical. Make sure you are connected to a separate 2 amp USB power source. Most TV's and some Roku plugs are just not powerful enough.