Your TV turns on but no picture or sound? Sometimes, all you need to do in order to get picture on your TV is to restart it, i.e. turn it off and back on after a few minutes.
If you didn't get picture after restarting the TV, check out the other solutions.
Note: You can also do a "power reset" of the TV, which involves unplugging it from power socket and presssing and holding the power button for at least 10 seconds. Afterwards, plug the TV back in the power outlet and turn it on.
Maybe a software-related issue on the computer prevents you from getting picture on the TV. In this case, restarting the computer should fix the issue.
Maybe you forgot to turn on the computer, or wake it up from the sleep/hybernate mode. If this is the case, your TV will have picture once you turn on the computer.
By putting your computer to sleep and waking it up again, you will make the computer search for (and detect) your TV again.
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