A liquid submersion-cooled computer that is configured to reduce physical structures passing through walls of the computer liquid-tight computer case, which eliminates the amount of sealing needed around those physical structures and reduces the number of possible fluid leakage paths from the interior of the computer that contains a cooling liquid submerging at least some of the computer components. The computer includes a mechanism to pass input/output signals into and from the computer without any physical structure extending through any of the plurality of walls. The computer also has a mechanism for wirelessly transferring power into the interior space of the computer case, and a switch that controls power in the computer without having any physical structure extending through any of the plurality of walls.