Does anyone have a circuit diagram for the 192 version RNS-E motherboard? Like many others I have been having display issues and have spent a while investigating the internals and changing ribbon cables and displays (I have a spare RNS-E for parts). However, I have come to the conclusion that most display issues are related to corrosion of the display ribbon cable. Specifically, the two connections that carry what must be a substantial current to the LCD backlight. In my case the ribbon was burned but also the inside the ribbon connector on the motherboard. When cleaned it will work for a few weeks but sooner or later the display will lose the backlight function. I am going the try and bypass the two connections for the backlight but would like to see if there is an easier "pickup point" than the ribbon connector which has extremely small solder points. if anyone has a motherboard diagram I would be most grateful for a copy!