Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Here are instructions that ought to work for this problem:
First disconnect the power from the wall outlet, then hold down VOL Minus and INPUT on the set's own keyboard.
Then plug the TV in again while still holding down those two buttons, until the set comes On. You should see a 'K' in the corner of the screen.
Press VOL Minus and CHANNEL Minus, you should see rows of char.s.
Now go to using the remote control
to go through the menus using Channel buttons until you find
Highlight or select Industry Init, page 2 of 40.
Set that option to ON using the VOL button, press ENTER to execute.
Version number should show up, and the word SUCCESS at the top.
Then turn Off the power to the TV. Not before!
I hope these instructions get you through to a successful outcome. Let me know!