Does anyone have any idea as to how I might reset my DVR. When I go into the menu some of the sub-menus are missing, such as the advance menu does not show the net config sub-menu page. or the backup menu can't be accessed. The machine is a 16-channel AVTECH AVC787D. Also the DVD-RW does not eject. However when the system boots the DVD is accessed but the draw doesn't open.