I understand.

Regrading warranty I meant lifetime support for problems related to your System76 laptop. The warranty for a hardware is gone I think but I guess when you describe your issues correctly and they won't resolve it maybe they will suggest you something friendly.

And I get your point with the case. Tbh looked like it.

Hmm do you have up-to-date firmware? I had similar issue resolved by it.

Also faulty motherboard sounds like manufacturer issue not yours.