Press buttons on remote, and the tv turns off?

When I press any buttons like setup, arrows, or volume and channel, the tv just turns off! Any reason why? I have the tv set on a darker mode to save energy throughout the night, as I leave it on for comfort when I go to sleep at night. Now, I can't change it back because all the remote does is turn it off. ... show more When I press any buttons like setup, arrows, or volume and channel, the tv just turns off! Any reason why? I have the tv set on a darker mode to save energy throughout the night, as I leave it on for comfort when I go to sleep at night. Now, I can't change it back because all the remote does is turn it off. It's really bizarre. Any idea what's going on? Thanks in advance.
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