dosobye

Hello I have a Dvr5108ss system and the buttons don't bring up the menus. I've reset the system multiple times. I am getting video, but cannot go through menus. Remote doesn't work either. It feels like possibly they menus are there but invisible, as if I keep mashing buttons something happens. This system was already there and I don't really have any manuals or knowledge from the previous owner. Any help would be appreciated. Thanks