This is a Pioneer VSX-D811S Reciever. I have only had it for 8 months. Just this afternoon, when I turned it on, any vol past medium loudness and the reciever says "overload" and turns off. This also happens right at medium-low vol levels right when I big hit in sound comes on a movie. It also does the same when hooked to a CD player or anything else. 1)What is wrong and is it common? 2)Is it ok to hook a laptop with headphone out into the AUX of a reciever and listen to music through it? That part won't damage it, will it?