for those with a bit of electronics behind them and want to MANUALLY put the screen UP/DOWN do this.
pull the screen out from the dash.
pull the top off where the plugs go in
locate this IC (see attachment)
tack 2 wires onto these locations:
M+ (screen UP)
M- (Screen DOWN)
these are located JUST below the Vref pin. grounding either of them will result in the screen moving the desired direction and stopping on its limits.
getting video into a defunct screen ( you still need the navi for the data feed)
locate TV + / TV - on the board and feed a composite NTSC signal into it and USE THIS CIRCUIT to get sync
power it accordingly (suggest +9v as there is a supply there for that.)
enjoy
dont ask for help - if you do not understand what I posted DO NOT ATTEMPT IT!