Why is my jvc lt-43c870 completely locked and not turning on?

Don’t give me BS about using a remote because it doesn’t work, my TV is unresponsive to anything. Turning the cable off and on or using the remote simply doesn’t work. I know there is a way to undo this but I really need some help on how to do it, otherwise my TV is unoperational. However there is this tool which... show more Don’t give me BS about using a remote because it doesn’t work, my TV is unresponsive to anything. Turning the cable off and on or using the remote simply doesn’t work. I know there is a way to undo this but I really need some help on how to do it, otherwise my TV is unoperational. However there is this tool which may help since I have no idea of the purpose
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