Lexus ls 400 cranks but wont start and all dash lights are on

SOURCE: My lexus ls 400 will

First you have to determine weather you have a FUEL problem or (ELECTRICAL)Spark problem ??

Pull the coil wire off or a easy to get to spark plug wire, Lay it close to were you pulled it off of (Do not hold or touch you may get SHOCKED) and crank motor (need two people) look and listen for a spark, if you see or here a spark, then go to next step which will be to check for Fuel (gas). Be very careful when checking fuel, as most lines are under pressure and may cause bodily harm such as BURNS to EYES and SKIN!! Loosen or pull the inlet fuel line off and put rag over line. Some fuel injected vehicles have a fuel rail the has a valve that looks like a tire valve. Put a rag over this valve and push it in with a small screw driver and have someone crank motor a couple of times to see if fuel is coming out.

If NO Spark---Could be a lot of things Points (older vehicles) Modules, Coils, Crank Sensors, ECT......

If NO Fuel---- Could be Clogged fuel filter, Fuel Pump, Fuel pump Relay, Fuse, ECT..........

Hope this helps you ??

SOURCE: 1994 lexus ls 400 problem with dash board light

Try rotating the ignition switch slightly after you turn it to on and see if the lights come on...had the same problem and changed the switch fixed the problem...