Not sure they need to do anything. Maybe in the interest of smooth sailing, and closing things off, then the board might be motivated to reach a mutually accept

Not sure they need to do anything. Maybe in the interest of smooth sailing, and closing things off, then the board might be motivated to reach a mutually acceptable conclusion. Whether this be a little buyout, an advisor tie-in, etc, completely depends. Situations like this is why founders create equity agreements.