Samsung UN55FH6200FXZA - Manual (Page 618)

Picture (Troubleshooting)
First, perform the Picture Test to see if
your TV is properly displaying the test
image (go to Support
→
Self Diagnosis
→
Picture Test ).
If the test image is properly displayed,
the poor picture may be caused by the
source or signal.
The TV image does not look as good as it
did in the store.
Store displays are all tuned to digital,