A:Answerit does go up to 100 but it might not be loud, it does not come with hdmi, yes they can set it up for you if you ask for a cost, usb cable is not include and I think you where thinking of rca cable which are yellow for video, white and red for sound.
A:AnswerIf your Roku has an HDMI output there should be no reason why you can't use it with this set. Recommend you plug it into the HDMI 2 port.
Are you sure your Roku is functioning? Does it work on other TV's?
A:AnswerIt has the input button on the lower right side. You can turn the tv on with this button, but not off. You have to use the remote for the rest of functions. I like it better when the on/off and volume buttons are on the side of the tv. That is the thing I don't like about this tv