Car does not start

[Enzoardovini]

Good morning. I purchased my lancia phedra 2 years ago used. Never had a problem. Now without warning does not start. I see all of the normal lights on the dash but no go a mechanic told me it was the centralina that needed to be reset. It worked for one day and back to not starting. I think I hear a humming when I turn the key but no noice of engine starting. Does anyone have the same problem and how was it resolved.
Thank you

[LanciaFin]

Hi, Phedra is 100% PSA technology, so Citroen/Peugeot specialist may be able to help.