Black Screen No Sound

Step 1
Cycle through the TV's video inputs to verify that your TV is set to the right one. For instance, if you are attempting to use a digital cable converter box that is plugged into the Video 1 input and the TV is set to a Video 2 input that has nothing plugged into it, the TV will not display any picture or sound and may even say "No signal" on the screen. To cycle through the inputs, use the input selection button, typically labeled "input," "source," "TV/video" or the like.

Step 2
Reseat the video and audio input connections to verify that a loose cable is not causing the TV's loss of signal. If you have a coaxial cable connected from your wall cable jack directly into the TV, it may have come loose thereby eliminating all picture and sound on the TV. Locate the connection cable or cables of whatever device you're attempting to
watch and unplug/replug them from where they plug into the TV.

Step 3
If the above does not solve, look in your manual for instructions for a hard reset or obtain a walk-through from the compay: use the contact information at https://www.contacthelp.com/dynex.

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https://www.manualslib.com/manual/41503/Dynex-Dx-L40-10a.html?page=21#manual

Test different inputs and sources: Switch to different input sources (e.g., HDMI, VGA, Component) on your TV to see if the black screen issue persists across all inputs or if it is specific to one input. Also, try connecting a different device to the TV to determine if the problem lies with the TV or the original device.

Check the settings and remote control: Make sure the TV is not in a sleep or standby mode. Use the TV's remote control to adjust the volume and navigate through the menu options to ensure that the settings are correctly configured.

Perform a power cycle: Turn off the TV and unplug it from the power outlet. Wait for a few minutes, then plug it back in and turn it on again. This can help reset the TV and resolve temporary issues.

Reset the TV to factory settings: Consult the TV's user manual or menu options to find instructions on how to perform a factory reset. Keep in mind that this will erase any custom settings and preferences, so make a note of your preferred settings beforehand if possible.

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