There's also the risk of ESD damage due to switching these signals manually.
The joy/control panel would proably be ok... but I wouldn't want to switch the active signals (video / sound) or power with these switches.
I would not want to swtich anything live power or video wise using a printer port swtich.
Just mean you going to have to power down until it discharges then swtich over to power back up.
maybe a Nice LED to indicate which board has power and when It has discharged..

