Take out the base station module (100kg) or the PA unit (37kg) put in a new unit and set it up, what could be easier than that, unless they don't carry backup spares as any good company should.
Then while they have happy customers they can repair the faulty unit in the workshop and everyone would be happy at the quick service.
Then while they have happy customers they can repair the faulty unit in the workshop and everyone would be happy at the quick service.