First off, would not start is not much to go on. I doubt it is your screem and not an alarm module. What exactly happens? Does it crank but not start? //////////////does it start but not keep running? When you turn the key on does the fan run at high speed? Most dealers have no clue about these cars. I do believe it is probably something you can fix. If it were the screem you can have it repaired for about $500.00. Please give a bit more detailed info. It may also be your RCM or a bad ground connection or a couple other things.