I have had a 90 and 92 240 with the same symptoms as yours. Each time it happened I found that corroded connectors in the fuse panel was the cause of my no start problem.. The way to check if there is a problem with the connections is to perform a voltage drop test from one fuse tab to the other.. To fix the problem clean the tabs that hold each fuse in with a brass brush or emery cloth and clean or replace the fuses. To prevent this from happening again coat the tabs and fuse ends with silicone dielectric grease. Good luck Bill Burns