It's cheaper and easier to pull the "box", but since you have a
convergence/geometry problem it is not really feasible. They will need the
cabinet to set it up after the repair. One exception is if it is only the
convergence power supply and not a failure on the convergence board.

If the convergence board needs an EPROM an in-home or box only repair is out of
the question, they will need a "chipper check" interface and a computer with
the proper software installed to complete the job. Even if you need a
convergence board, and even if they take your old EPROM with the set values and
put it in the new board some touchup will be required. This requires the "guts"
to be mounted in the cabinet.

JURB