Hi just wanting some advice, i have a Panosonic 42 inch tv 2012 model, i have 3 hdmi ports but i am not down to just one working one, i have done a factory reset as well as change the input names to game/blueray to see if they kicked back into life, but no luck so far. Has anyone replaced the main board and is it expensive or should i buy an hdmi switch?. Also as well what is a good brand of hdmi switch can they cause more damage using one?. Thanks for your help