lg 60pv250 60 inch 1080p truslim frame plasma tv

Hi guys, I have just upgraded my Toshiba 42" to a LG 60". What I used to do is connect my laptop via HDMI to my Onkyo 605, which then went into the TV. All I would usually have to do is just close the laptop monitor, and the signal would then go through onto the TV. I have it going through...