If these are diagnosed faulty, they can be replaced with exactly same models using specialised soldering equipment, however they are most likely non-upgradeable due to high firmware and BIOS integration.
I suggest attempting to reset the cmos on the motherboard via a jumper labeled pwr cmos, power jumper or just plainly, a big shiny flat yet round coin style battery. There are lots of tutorials on that topic with more info than I care to share here. Good luck!
