Samsung PL64E8000GFXZP - Manual (Page 564)

Trouble Powering On
Press the power on button on the TV or
remote and the light should blink about 5
times before the TV turns on.
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