I forgot the ignition on over night and of course all electricity way gone. Tried start helper and at first I didn't have enough power to rotate the engine. Mounted a another battery and having now good rotastion on the engine but it will not start. I'll belive it not come diesel. Is there anybody who can give a tip what could have happend after power loss ?

 

If you left the ignition in in a diesel, you may have burned out all of the glow plugs. Check by getting an ohms reading on one or two.