User Manual Ver.1.0 (English)
Page 629
Replace the Component video cables with a Component cable connection. The picture won't display in full screen. Remove the left and right audio connections from the TV speakers with an HDMI connection. If the buzzing stops, this indicates that the Set-Top box has a grounding issue. Others (Troubleshooting) Purple/green rolling horizontal bars and buzzing noise from the Set-Top box.
Replace the Component video cables with a Component cable connection. The picture won't display in full screen. Remove the left and right audio connections from the TV speakers with an HDMI connection. If the buzzing stops, this indicates that the Set-Top box has a grounding issue. Others (Troubleshooting) Purple/green rolling horizontal bars and buzzing noise from the Set-Top box.