Lg sl80

I just purchased an LG SL80 and connected it to my Sat PVR and I receive wonderful reception and picture quality. However when watching non HD stations I get this flicker like a light flash across the bottom of the screen. The unit is connected to the SAT dish using HDMI cables.
Any suggestions from the group?

Have you tried hooking up your Sat PVR via component?

Just wondering if it might be an HDMI issue with the Sat PVR, maybe a firmware update is needed.

Have you tried any other scenarios to see if this occurs?