It is possible, to remove the circuit boards, and find an electronic geek who tests and repairs boards,,,if a chip is not faulty, the remaining capacitors (swollen or leaking) , can be replaced,,the resistors or diodes rarely fail,,.,the IC chips can be replaced but won’t work because they are not programmed to operate the gauges, Someone could make a ton of money repairing the faulty boards,,,water gets in,,,gets trapped,,,and usually corrodes the board,,usually at the ground pin,,there are threads on the net how to cut out the board,,,gauges are a fortune,