Case 435 with a Iveco Diesel 3-cylinder was running for a couple of hours. Had half tank of fuel. Turned engine off, returned after supper and it won't start. When you sit on the seat, the fuel gauge displays over half tank of fuel. When you turn key on to start, fuel gauge disappears, the screen goes blank, the engine cranks and doesn't smoke... it will not start. Checked fuses, 15-amp fuse showed heat damage so I cleaned it with contact cleaner and replaced the fuse. The symbol in the fuse box cover displays a padlock for that position. Thank you for any and all ideas to get this running again!