@57: Since you answered anyway and are pretty close by (my in-laws are in Pickering and I am in Whitby), could you let me know if SD works for you
My SA8300HDs have Auto-HD, so when I tune to channel 46, I get the HD feed. I have one SD box, but it's connected to an audio receiver and not a TV. When I tuned it to channel 46 I got audio, so I guess it's working.
I think JamesK hit the nail on the head. HGTV is now digital only, recently removed from analogue. Static is not typical of tuning with a digital STB - usually it's either a black screen, or "not authorized". If you do have a digital STB, call Rogers to get it properly authorized.
Analogue Migration Thread: http://www.digitalhome.ca/forum/showthread.php?t=146605