Default [Q] Galaxy s4 need new motherboard?

I have a telus galaxy s4 that had water damage. After being dried out the external speaker doesn't work and the headphone jack rarely works. I tried adapt sound to force the headphone jack off and sound still doesn't work. I replaced both the external speaker and the headphone jack, still nothing. Would I likely need to replace the motherboard now? If so do I need one from another telus S4? Thanks