jetking provide a career certificate course for hardware networking course(15months, 6days week) , other way iiht provide diploma course(2years, 3days week), which one i go and why?

One simple question for u - U must have some sort of computer knowledge i know cos now a days computer has taken place of TV at home. If my Hard Disk gone damage should i replace or repair? If Motherboard got damage will it be repaired or replaced? Now a days all these r coming with 3-5 years of war