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#41
Repairing (replacing) the jack, if it is bad, can be a major task. Most circuit boards are multi layered and special desoldering/soldering equipment is needed so the circuit board traces are not destroyed, plus getting an exact replacement jack can be a problem. However, on many laptops the I/O jacks are on a separate "daughter" board and if jacks are bad replacing that small daughter board is the way to go.
I have an "SMT" (Surface Mount Technology) workstation for desoldering and soldering but still would be leery trying to replace a jack such as the headphone jack.