Hello to the board. I am a noob and I have the following problems that I hope some of the experts here can answer. #1 - I normally leave my costar on all the time, however if I don't use it for a day or two, the V button won't bring the menu up. I can still turn off and then back on the unit but unless I go and unplug my costar and then re-plug it, the menu display is all screwed up. What I mean by screwed up is that part of the menu is off screen. If I unplug re-plug it works fine. #2 - What does the cache cleaner app do and why do I need it? #3 - Why the costar does not have a turn on/off light in front? Thank you for helping me.