I just moved my tv and set it up in my apartment. This is the first time that I've actually had to set it up. After I plugged it in and hooked it up to my cable box I hit the power button and it turned on for a second, and the show that the cable box was set on flashed, and then it went black and the red standby/temp. button started flashing. It will not turn off unless I unplug it. And when I replug in the tv it does the same thing all over again. Please help!