Samsung UN55ES8000G E-Manual page 706

If you find that you are having trouble
powering on your Samsung television,
there are a number of things to check
before making a call to the service
department.
If you're sure your power cord, remote
control, and PC are functioning
properly, you may be having a cable
issue. If you have a cable or satellite
box, your TV may appear to be off
because the cable or satellite box is not