hey i was wondering i just changed my setup around and i now have my panasonic Sa-HE75 Reciever directly on the shelf under my tv and everyonce and a while i get the purplish pinkish colour in the corner so i have to unplug the tv and plug it back in so it can degause (the tv is a Panasonic Tau 32 inch its a year old) i was wondering if this could impact the life and what i can do to stop it? thanks