vw jetta (AFX) computer box problem

I've VW jetta(afx) ,I packed it for a month and  then  i wanted to drive it on friday.i tried to start it for an hour nothing has happened ,after that i call the other mechanic and told me that its a computer box.he used his computer box and my car start...is it posssible for a computer box to be dead..or do i need to try to do something

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