Possibly, if the problem is somehow related to flash memory being in correctable state. If not, it's HW problem and unrepairable really.

You mentioned that Nokia Care Center could fix it for $20 but I find that highly optimistic.
They are counting on fixing it by flashing but if you cannot do it yourself they cannot do it either. If it's damaged HW that means chip-level/board-level replacement and they just are not up to it.