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Can't get my tv to stay on

When I plug my tv in, it says toshiba Chromecast and then the screen goes black. Red light is on. Then after about a minute, the red light dissapeares. Will not turn on with remote, only by unplugging and then plugging back in.

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lbrown3240  sounds like a signal issue. Unplug all inputs and unplug that TV from the power outlet. Hold the power button down for something like a minute. After that, plug your TV in again and only connect one input. Use a local input like a DVD player, game console or similar. See what your TV displays then. Let us know the exact model for your TV so we can try to help you further if needed.

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I did what you suggested. I unplugged everything, held the power button on tv in for a minute, plugged only the HDMI for blueray player back, plugged the tv in, and it did the same thing. Model #55L621U

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After the screen goes black, the standby light is on, about 30 seconds and then goes out. TV will not turn on by remote or by the power button on tv. I know i said before that it stayed on for about a minute, but it's more like 30 seconds.

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After I plug the tv in, screen says toshiba Chromecast built in. Standby light starts to flash, like normal when turning on, and then tv and stand by light turns off. We know that the screen is going bad because the left side is starting to go dark but, logically, that shouldn't effect the tv staying on, correct? Furthermore, we know its not just an issue of the acreen being out because it displays when tv is initially plugged in.

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lbrown3240 “the screen is going bad because the left side is starting to go dark but, logically, that shouldn't effect the tv staying on, correct? ” not necessarily. If this is cause by s bad power supply or a bad t-con board your TV can shut down after it does a POST and determines that there is a failure. Time to check things out on a board level

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I'm going to go buy a new one and keep this one and see if i can fix it. Thank you for your help!

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