Google does show several hits on that search string, but but not provide too much in the way of diagnosis or corrective action. I figured TCF would be more direct!
From what I can gather, it appears to be an HDMI handshake issue, but not clear if it is a video or audio issue. Could be the HDMI cable/connectors, or the HDMI ports on the Roamio or TV (Sharp Aquos).
I do also see a frequent PINK (magenta) flash on some channel changes from the guide. Maybe my cable is bad, though it had been used on my AppleTV for a long time without similar issue.