Make sure that the set-top box is correctly connected to your TV.
It says there is no signal on the screen.
Check whether the antenna or the cable connected to the external device is properly
connected to the TV.
Go to to choose the connected input.
Check if your external device, such as set-top box or Blu-ray player, is turned on.
I cannot see some programmes.
Launch General Programmes Programme Tuning (Programme
Tuning & Settings) Auto Tuning.
If you are using a set-top box, consult its supplier.
The screen is cut off.
Go to Picture and change the Aspect Ratio.
When viewing videos through an external device (set-top box, game console, etc.) or
content app, check the screen size settings in the settings menu of the device/app.
There may be differences in the screen ratio provided by each device/app.
The screen shakes after the momentary appearance of vertical/horizontal lines and
net pattern.
Connect wireless telephones, hairdryers, electrical drills, etc. to a different power outlet.
The problem may be caused by high-frequency electronic devices such as another TV or
strong electro-magnetic sources nearby.
Each programme has a different image quality.
Depending on the type of videos provided by the broadcasters, programmes may have
different image qualities.
If you are using a set-top box, consult its supplier.
Run Screen Self-diagnosis first. If it is normal, there may be a problem with the
broadcast signal.
There is a difference in image quality from those seen at the store.
