I have a Disco 200 V8 model. Came back from a trip and next morning, wont start. By passed alarm system with key code. No luck. Checked all wires. Launch 410 diagnostic indicate that permanent power loss to ecu. Checked ecu and found three wires that had power on it when vehicle is switced on. (according to wiring diagram) Checked cranc shaft sensor = ok. All Instrument lights are on. Still do not start.

Have a 99 disco....I had to take the gear selection control box, underneath the center consol. There isa switch that came loose that interfaces with the brake and ignition to start the car. Also there is a selenoid in the box that could go bad. also could be a bad brake switch. Try pushing the gear shift foward in park while cranking, if it cranks then the gear selection switch is bad. The problem is between the key switch and the starter....trace it down. Also you can buy cheap a LR repair disc.