I had a TiVo Premiere connected to my Panasonic TCP55ST60 Plasma TV through my Marantz NR1603 A/V Receiver via HDMI and both audio and video were working fine. When I received my new TiVo Roamio Pro I unplugged the power and then moved each cable one by one from the Premiere to the Roamio Pro. When I finished all the connections, I plugged the power cable back in and no video showed on the TV. The green light on the front left of the Pro came on indicating that it was receiving power and the amber light just to the right of it blinks whenever I press a button on the remote so it appears to be receiving the IR/RF signal from the remote. I have tried taking the HDMI cable out of the loop and running it directly from the Pro to the TV. I have also tried using component between the Pro and the TV. Neither of these methods shows any video either. I have also tried pressing the resolution button on the back of the Pro, in case whatever the signal it puts out by default is one that my TV doesn't recognize. That doesn't work either. Is there anything else I can try before I send it back for a refund?