Where tp find the proper place to fix a computer in PT Cruiser when it need ?

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My check engine light came on and I have had 3 different work on car & add parts. The problem boils down to this. Every morning car has to be jumped off to get it started. It runs fine & starts the rest of day. So everything has been checked over & some parts have been changed. Now they are saying the computer in car is not working correctly. I will gladly take it to somewhere that can fix it but don't know where to go. Probably the closest place is Nashville , Tn. Please help. This car has run perfectly for 12 years & I had kept the maintenance up always.