Hisense TV Keeps Dimming: How to Fix?

It can be incredibly frustrating when your Hisense TV keeps dimming unexpectedly. A television that doesn’t maintain consistent brightness levels can be difficult to watch and enjoy. Thankfully, there are a few steps you can take to troubleshoot and resolve this issue.

How to Fix the Dimming/Brightness Problem of Hisense TV?

This guide will walk through the most common reasons a Hisense television might be experiencing dimming problems and provide troubleshooting tips to help restore normal brightness levels.

Hisense TV1

Check External Factors

  • Before diving into TV settings and adjustments, consider any external factors causing the dimming issue. Is your TV in a very bright room where light reflects off the screen? This can sometimes cause the TV’s backlighting to dim itself down. Try closing blinds or curtains to block excess light in the room and see if that improves the picture.
  • Excessive heat can also cause some TV models to dim. Ensure your Hisense TV has proper ventilation and is not located near a heating vent or other heat source. Give the TV time to cool down if it’s been on for a long stretch. Let the TV’s internal components regulate themselves.
  • Finally, check the brightness setting on any devices feeding into the TV, such as a cable box, game console, or Blu-ray player. An externally connected device may have its brightness output turned down, dimming the TV picture. Make sure connected devices are set to optimal brightness levels.

Adjust Backlight Settings

  • If external factors are not the culprit, the TV’s own settings likely need adjustment. Start with the backlight setting under your Picture settings menu.
  • The backlight provides illumination for the entire screen, like a lamp behind the TV panel. Check that backlight output is set near maximum, around 90-100.
  • This will provide the strongest backlight brightness. Note that some Hisense TVs have separate settings for backlight level and backlight brightness – adjust both to get the strongest backlight intensity.
  • LED backlights can also degrade over time, eventually losing brightness. If your TV is several years old, it may simply need service to replace worn-out LEDs in the backlight system. Contact a TV repair technician to inspect and replace aging backlights.

Disable Energy Saving Features

  • Many Hisense TVs have energy-saving features that can cut back on power draw by reducing screen brightness. While well-intentioned, these features can give the impression of a dimming picture.
  • Go through your TV’s picture settings and disable any energy-saving or eco modes. Also, turn off auto brightness adjustment or auto backlight dimming.
  • This will ensure consistent illumination over time. Auto picture modes can interfere by changing settings on their own – switch to a standard or custom picture mode.

Hisense TV

Check HDMI Connections

  • A weak HDMI connection can also cause dimming, flickering, or blinking on a Hisense TV. With the TV powered off, firmly reseat all HDMI cables connected to devices like a streaming stick, game system, or A/V receiver.
  • Securely reconnect them all the way into the ports on the back of the TV. Power the TV back on and check for improved picture brightness.
  • Faulty HDMI cables can’t transmit the necessary video signal strength and may need replacement. Try substituting cables one by one to isolate the problem.

Reset Picture Settings

  • If your Hisense TV picture settings have been customized over time, this can lead to suboptimal brightness levels.
  • Reset the picture menu to the factory default settings. This can be done on most models via the General Reset option in your settings menu.
  • After resetting, remember to re-adjust any customized settings like motion enhancement or color temperature. The TV will be restored to preset brightness and backlight levels ideal for its panel.

Check Hisense Warranty Status

Some dimming issues may require professional repair by an authorized technician. LED backlights, in particular, have a higher failure rate than older-style backlights. If your Hisense TV is still under the manufacturer’s warranty period, they will repair or replace defective parts like the backlight assembly. Contact Hisense customer support online or by phone to start the warranty claims process. They can diagnose the issue and arrange to fix a dimmed TV under warranty.

Outside of warranty, users may choose to contact a local TV repair shop experienced with the Hisense brand. Shopping around for the best deal on labor costs is recommended. Backlight repairs can be pricey on some TV models. Older TVs may be more cost-effective to put that money towards a brand-new replacement rather than sinking money into repairs.

Hisense dimming

Take It One Step at a Time

Don’t get discouraged if your Hisense TV keeps dimming – with some methodical troubleshooting, you can get to the bottom of the issue. Check external factors first, then review TV settings, connections, and hardware repair options. Take it step-by-step, ruling out possible causes. With persistence, you will hit upon the right solution. Your home entertainment experience will return to vivid, bright, and bold viewing.


Hisense produces quality televisions that should provide years of enjoyment. But like any TV, technical issues can arise over time. A suddenly dim picture can dampen your viewing experience and become frustrating. Thankfully, this problem can typically be corrected with a few easy checks. Review external conditions, adjust TV settings, secure connections, and press for repairs if under warranty. With concerted but calm effort, your dim Hisense TV can be restored. Troubleshoot methodically, remain patient, and you’ll once again be enjoying television’s visual splendor as it was meant to be seen.

About: Pankaj Konwar

Pankaj Konwar is the founder and writer of 5GMP. He writes in-depth buying guides, tips for troubleshooting common TV problems, and reviews of the latest TV models.

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