Facing TV Problems? Ask a TV Technician.
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If you're using DirecTv, then you don't change the channels on the TV itself anyhow- you change them using the DirecTv remote- which changes channels on the DTV BOX (not the TV).
Please follow the steps below:
1) Shut the TV off, and then disconnect the cable/SAT box AND the TV from power (unplug their power cords).
2) If using an HDMI cable, disconnect and reconnect the HDMI cable on both ends when the cable box is unplugged from power (make sure it's secure on both ends).
3) Press and hold the power button on the TV itself (not the remote) for 10 full seconds while the set is unplugged, then release the power button.
4) Plug the cable box AND the TV back into power, then turn the TV on and attempt to watch a program.
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