I moved into a new house recently and decided that I wanted all of the cables to be in-wall. I have a three part HDMI connection from the HTPC to my TV using wall plate connectors. A cable is going from the HTPC to the wall, the cable through the wall, and then from the wall to the TV. Anyway, my HTPC would periodically reboot with a BSOD when switching on the TV and I could not figure out what was causing it, since I hadn't made any changes to the system. I ended up swapping out the cable from the wall to the TV, since I didn't need a 6' cable back there and lo and behold, I haven't had a spontaneous reboot for weeks. Obviously the cable was the issue, but why would the computer freak out when it is sending a video signal and not receiving one?
Edit: Oh, forgot about the HTPC->Receiver link as well. Make that a four-part connection from HTPC to TV.