A faraday cage with the right hole size, or a faraday shield of sufficient thickness, should protect it against very intense effects, up to EMPs. Just being di

A faraday cage with the right hole size, or a faraday shield of sufficient thickness, should protect it against very intense effects, up to EMPs. Just being disconnected already helps, it comes down to strength of the solar flare vs length of metal piece. I know some military hardware is built with a metal box with holes on the inside of the plastic case -- a faraday cage -- though that probably also serves to minimize RF leaks.