I need some help from someone smarter than me(a very large subset of the populace). I have both a XL4 and Roamio running through an HDMI switch. They are connected to a Marantz SR 8001 AVR running to an older Sony XBR TV. Been using the setup for years with no significant problems. For that last month or so every time I turn on the TV and AVR i get lengthy periods of screen flicker alternating with complete snow and no audio. Eventually, although sometimes it takes up to 10 minutes it all seems to settle down and operate normally. This happens with both Tivo's when switching back and forth(until both settle down). this is maddening. At first i thought perhaps it was some kind of HDMI handshaking issue so i replaced all the HDMI cables with new. Nope. So I replaced the switch with a better one. Nuh-uh. It seemed unlikely it would be the Tivo's since both were acting the same way. So, I ran one Tivo directly to the TV and , lo and behold, working(at least once i turned the crappy TV speaker back on). Have i answered my own question and narrowed this down to the AVR? Which would suck as it's the finest piece of audio tech I've ever owned, even if it is 12 years old. Or could it be some less tragic problem? And, if it is the AVR, is there a fix short of scrapping it? IIRC the AVR was only HDMI 1.1 or 1.2--could that be the issue?