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Original post by: dreamerdawn69 ,

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I have a vizio 400k smart TV. I got it for free because of this issue. The screen would shut off after about 10 mins of it being on but the sound still worked. Just went in and changed picture settings to standard and turned off sleep and power mode. So far it's been about 25 mins and it's still on.  Hopefully it stays that way but I believe it's fixed. :)

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