"ParaO" wrote: There is obviously a reason for using the USB.....
And there's obviously a reason for the included power supply.
"ParaO" wrote: I have the TV Wall mounted therefore power supply isn't an option!
If there's not another AC power outlet (besides the one that's powering the TV itself), then you don't have much of an option.
I've never had an issue when I've experienced others using the USB of a TV to power. What you're describing is unusual.
To troubleshoot, you can try running an extension cord and using the power supply and see if the issue continues. After powering the TV off, remove power from the Roku. Turn the TV back on then restore power (using the power supply) to the Roku. If the beeps still happen, there could be an issue with the Roku.
If the beeping does not happen, the power from the TV might not be sufficient to work properly (keeping in mind that it's not necessarily binary; it could sorta work, and that may be what's happening).
DBDukes http://www.dbdukes.com/Roku Ultra (4660) Roku Premiere+ (3921)