I just picked up a Denon AVR-E300 and so far its been pretty amazing but ive run into a little snag setting it up. Im trying to connect my computer to the HDMI ports but all i get is a black screen saying no video. Am i missing somthing? Ive already done a hard reset on the Receiver. Ive tried multiple computers they all work fine on my Onkyo. Works fine connecting directly to the tv. Anyone have an insights that i might be missing.