I cannot get a video signal with the HDMI cable connected. I do get a connection with component cables connected, but it is not HD.
Can you suggest a corrective action that will allow me to use the HDMI cable?
Unless you have a very unusual box the component outputs are HD. The only difference between Component and HDMI is that component is analog and HDMI is digital, but the resolutions should be the same.
Retrieving data ...