Hi there im a new member & my 2007 1300 diesel grande punto is giving me a headache!!went to start it yesterday & there was no power whatsoever,no interior or dash lights nothing!!it was runing perfectly the night b4!ive not tried to jump start as i had a similar prob a few months bk when i bought the car it turned out to be an earth strap had come loose,will a rusty nut holding it on to the chasiss possibly be to blame as everthing else looks to be ok & i cant c it being the alternator as all power was fine beforehand!!!pls help