Corroded USB-C Port Causing Issues With Display

Hi all, I started having glitchy issues with my Retina display. Seemed to be worse with lots of darker colours on the right hand side of the monitor. Also at first the glitches seemed to go away if I closed the display a bit. This didn't last long and the glitches got worse.

As the monitor was replaced in the last few years and under warranty I sent it in to Apple to be repaired. They tell me the display is fine but there is a USB-C port that is corroded and messing with the motherboard and I would need a whole new motherboard to fix the problem. As I can buy a second hand one of the same cheaper than the fix it seems a bit crazy to do that.

I'm hoping there's a way around this. Can I just disconnect the offending USB-C port to see if the issue still occurs or can I replace it with a new one instead of replacing the whole motherboard?

Anyone else had this issue or have any advice?

Cheers,

Tao