motor turns over but will not start on 2005 Mercury Sable

car won't start. ford company upgraded system but it is still doing the same thing. when you turn the key to the off position there is noise coming from the dashboard where the mileage, avg, temp etc. Ford said they put computer on it but didn't detect anything wrong. HELP!!

Asked by for the 2005 Mercury Sable
Have it taken back to Ford let them deal with it