I just upgraded my DVR from a DCT-6412 to a DCX-3400 (I wanted the large recording capacity). The former connected to my LG 47" Scarlet using a DVI to HDMI cable, while the new one uses a regular HDMI-to-HDMI cable. Using the new DVR, the TV now powers off then back on whenever I switch from an HD format signal to a SD format signal. There seems to be some sort of incompatibility between the TV and DVR. If I manually cycle between video formats using the FORMAT button on the front of the DVR, the TV turns off/on when I go from 720p to 480p or from 480p to 1080i, so it definitely appears to be something to do with format switching.
I spoke briefly with the video store where I bought the TV and he said it was something to do with the SIMPLINK feature of the LG TV and incompatible protocols between the TV and the DVR. I checked and SIMPLINK is turned off and I have no other SIMPLINK compliant components so it appears unlikely to be the cause.
I also called Eastlink tech support but the person I ended up with didn't even know what HDMI and DVI were, or the format modes like 1080i and 720p. Needless to say she no idea what was wrong and scheduled a technician to drop by on Saturday.
Has anyone encountered this issue before?