How to reprogrammed faulty hardware chips

There is a very good chance that you can't.

Not all chips are programmable, much less reprogrammable - so it will depend on exactly what chip(s) you are talking about. Read the printing on the top, and see if you can find datasheet online which describes the chip and what it does. From that, you may be able to work out if it's possible to "reprogram" it.
We can't help you with that!

But ... be aware that "faulty hardware chips" are unlikely to be amenable to fixing, even if they were originally re-programmable. If the hardware has failed, the only recourse it normally to replace it, and that is well beyond the scope of most amateurs. In this modern world, most circuits these days use SMT (or worse BGA or COB) designs, where the chip (or silicon in the case of COB) sits directly on the PCB instead of its legs going though; those require special equipment to remove without catastrophically damaging the board beyond any hope of repair.

Even a skilled PTH solderer and reworker will think twice before attempting it!