Samsung 4000 Series User Manual page 209

Issues
Software Upgrade
over the network fails.
Others
Purple/green rolling
horizontal bars and
buzzing noise from
◀
the TV speakers with
Component cable
connection.
Solutions and Explanations
●
Try
Network Settings
●
If you have latest SW version, SW upgrade will not
proceed.
●
Remove the left and right audio connections from the
set-top-box. If the buzzing stops, this indicates that
the set-top-box has a grounding issue. Replace the
Component video cables with an HDMI connection.
English
in the menu.
Network
▶