Why Has My TV Screen Gone Dark?

What you can still see points to the first check

A show you can barely make out calls for a different first move than a screen showing nothing. We'd check the TV's own menu first when the screen is black, because a menu you can see gives you a useful next place to look: the source and its signal. If the picture is visible but too dark, we'd start with its picture controls.

Picture Mode, power saving, and a light sensor on an equipped TV can all make a visible image look dim. With a black screen, the selected input, an external device that's off, or a loose cable may be involved. On a TCL TV, sound without a picture can also point to an app, channel, connected device, or the TV display, so follow what the TV can show before changing anything else.

What the TV's own menu tells you

If the TV appears to be on, press Home, Menu, or Settings on its remote and look for a menu on the screen. This checks whether the TV can draw something of its own before you investigate the show or device you were watching.

On a Samsung TV without a One Connect Box, a visible Home menu means the TV is powered on and points to the wrong source or a missing signal. On a TCL TV, a visible menu points most likely to the app, channel, input, cable, or connected device. Try another source next to narrow down which path is affected.

If the menu never appears, a power issue is possible on a Samsung TV. For a TCL TV, the display, power state, remote, or connected source may be involved. Check any applicable external connection before you reach the service step below. If the TV doesn't respond at all, use its power troubleshooting route.

The picture is visible but too dim

With a picture and menus you can read, open Picture Mode while viewing the content that looks too dark. Modes change several picture settings together. Try another available mode and look at that same picture again, because Cinema can make an image look darker.

On Sony TVs, Cinema or Custom may darken the screen. If another mode still leaves it too dark, adjust the available Backlight, Picture, or Brightness setting to your taste and watch for the image to change. Use your model's instructions for its control names and menu route.

Keep the affected source on screen while making a change so you can see whether it helps the picture that brought you here. If another source looks normal while this one stays dim, compare the sources before making more picture changes.

Energy saving and room light affect brightness

Look for Energy Saving, Power Saving, or Eco among your TV's available settings. A Low or High Power Saving setting can darken the screen on Sony TVs, and energy saving or Eco controls can dim a TCL picture. Change the setting that affects the image, then check the same content again.

If your TV has a light sensor or automatic brightness control, check it in the room lighting you normally use. It can change brightness as the room light changes, and turning automatic brightness off may brighten the picture. Room light and reflective glare can also change how bright the screen looks to you, so compare it under the lighting you actually watch in.

When the image looks right, return to the source you normally use and check it there. If it still looks dark while another source looks normal, turn your attention to that source and its connection.

Only one source looks wrong

Try another source or connected device and see whether it shows a normal picture. That comparison helps you focus on the original app, channel, device, or connection when the problem appears in only one setup. You can make the same comparison whether the original picture is black or merely too dark.

For a Samsung TV, a picture in another setup rules out the TV as the cause of that particular no-picture problem. Keep changing one part of the affected setup at a time to find the device or cable that isn't working. For an HDMI source, another TV port or cable gives you a further comparison.

If the problem stays with one external device after its connection checks, contact that device's manufacturer. Tell them which device has the problem and which other source produces a normal picture.

The device is on, but its input is black

If you're watching a cable box, console, or other connected device, make sure it's on and awake. Use that device's remote to wake it if needed, then look for its picture. A TV can show black when the selected external device is off.

Match the TV's selected input to the connection the device uses. A box plugged into HDMI 1, for instance, needs the TV set to HDMI 1. An input with no connected device can leave you looking at a black screen.

If the input matches and the device still supplies no image, turn the connected device off and back on, then check for its picture again. Input menus and remote controls vary by TV model and software, so follow the choices shown on your own set.

The HDMI connection still shows black

For a black HDMI source, inspect the external cable and its plugs. On a TCL TV, turn off both the TV and connected device before disconnecting and reconnecting the cable. Seat it firmly at both ends, turn the devices back on, and check whether the picture returns.

A damaged cable needs replacing. If the HDMI picture is still missing, try a different cable and then a different TV port, checking the picture after each change. A different connected device can help show whether the symptom follows the original device or the TV connection.

For HDMI troubleshooting on a TCL TV, connect the device directly to the TV. Leave splitters, switches, adapters, and extension cables out of this check so you're testing the direct device-to-TV connection. Turn off the TV and connected device before changing that cable, then check the picture again after reconnecting them.

The TV never shows a usable picture

If the TV appears on but still shows neither its own menu nor a picture from another applicable source after these external checks, stop and contact the TV maker for support or service. Tell them whether the TV responds to its remote and whether any source produces a picture. If it's a Samsung TV, you can request service through its support center (opens in a new tab).

The external checks can tell you which setup fails; a missing menu can also involve the TV's power state, display, or remote. Give support the observations you made instead of choosing an internal part to blame.

Check the picture where it first went dark

After an input, setting, device, or cable change brings the picture back, return to the app or connected device that first looked wrong. Check that its picture is visible at the brightness you want, and that the TV still shows a normal picture when you switch to another source.