Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallBefore replacing a TV, identify what looks wrong: a consistently dim picture, brightness that shifts on its own, or motion that looks unnaturally smooth. Each symptom can point to a picture setting worth checking—but no setting change can prove that the TV’s hardware is healthy.
Start with the symptom you see
| What you notice | Settings worth checking | What they do |
|---|---|---|
| Films look unnaturally smooth | Motion smoothing or motion interpolation | Creates or adjusts motion to make movement appear smoother. |
| The picture is consistently dim | Energy-saving settings and picture mode | May reduce brightness or select a picture preset that looks darker in your room. |
| Brightness changes without you adjusting it | Ambient-light sensor, brightness optimization, adaptive picture, or energy-saving features | Automatically adjusts the image in response to room lighting or power-saving behavior. |
Names and availability vary by brand, model, software version, and sometimes input. Treat the terms below as settings to search for—not a universal menu path.
If movies look too smooth, check motion controls
Motion interpolation can make film movement look unusually fluid, often described as the “soap-opera” effect. Look for a motion setting named Motion Smoothing, Action Smoothing, Motionflow, Picture Clarity, or something similar.
Roku’s guidance for supported Roku TV models is to set Action Smoothing to Off or Low when watching movies. Roku notes that motion options vary across third-party Roku TV models, so the control may not be available or named the same way on every set. See Roku’s motion-smoothing guidance.
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Try Off or Low while playing a film you know well, then decide whether the result looks more natural to you. The setting is a viewing preference, not a repair test.
If the picture is too dim, check energy saving and picture mode
LG USA Support says that, for the models covered by its guidance, a dark or dim picture is usually associated with Energy Saving being on or Picture Mode not being set correctly. LG recommends turning Energy Saving Step Off and trying Standard picture mode; resetting the picture is another troubleshooting step. These are LG’s model-specific suggestions, not a diagnosis for every TV. See LG’s dark-picture troubleshooting guide.
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On your TV, search picture settings for Eco, Energy Saving, or a similarly named option, then check the current picture mode. LG notes that picture settings can differ by input mode, so a change that helps one source may not carry over to another. If you reset picture settings, be aware that this can undo adjustments you made to the current mode.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If brightness changes by itself, inspect automatic adjustments
A TV may intentionally change brightness to respond to room lighting or save power. Check for controls such as Ambient Light Sensor, Brightness Optimization, Auto Picture Mode, adaptive brightness, or related energy-saving options. Availability and behavior depend on the model.
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- Samsung: Samsung describes Brightness Optimization as adjusting picture brightness automatically according to ambient light. Its troubleshooting guidance also covers energy-saving features that can affect brightness. See Samsung’s automatic-brightness troubleshooting.
- Sony: Sony says its light sensor optimizes brightness based on ambient light. Sony also identifies Auto Picture Mode as a setting to check when picture behavior changes. See Sony’s picture and brightness guidance and its light-sensor help guide.
- LG: LG’s guidance on intermittent brightness includes checking picture settings and notes that settings may differ by input. See LG’s intermittent-brightness troubleshooting.
Turning off an automatic or energy-saving feature may stop the adjustment you dislike, but it also removes the behavior the feature was designed to provide. Compare the picture with the feature on and off in the room and lighting where you normally watch.
Quick Recap
Best Value
- A treat for the eyes: Sharp 4K brings out rich detail on our 43" flat screen TV, while colors pop off in lifelike clarity with HDR10. Roku Smart Picture cleans up incoming TV signals, optimizes them, and chooses the right picture mode.
- Seamless streaming: With fast Wi-Fi and apps that launch in a snap, Roku Select Series TVs get you to your entertainment quickly. You get excellent picture quality, clear sound, automatic updates, and more. It’s simple to use. Hard to outgrow.
- TV, simplified: With setup that only takes minutes, a simple-to-navigate Home Screen, and an uncluttered remote control that does all you need—Roku makes it easier to watch the TV you love.
- A world of free entertainment: Enjoy a huge selection of free live TV, news, sports, movies, shows, and much more—all just a click away.
- More streaming, less searching: With personalized picks right on your Home Screen, quick access to the sports and entertainment you watch most, and fast and easy search in one place—the days of endless scrolling are over.
Rank #4
- CRYSTAL PROCESSOR: Powerful processor enhances colors and sharpens details for a vibrant 4K viewing experience. Experience every shade of color as it was meant to be seen in dazzling 4K. Plus, make your movies, TV shows, games and sports look even better with powerful 4K upscaling.
- ENDLESS FREE CONTENT: Watch 2,700+ free streaming options, including 750+ subscription-free channels on Samsung TV Plus. Enjoy news, sports, movies, kids' shows and reality TV — all without a subscription. Discover endless entertainment with new content added regularly, tailored to your mood and interests.*
- MOTION XCELERATOR: Experience clear picture and smooth motion in games and sports. Enjoy smooth motion and clear visuals with technology that estimates and adjusts frame transitions in real time. Whether gaming or watching sports, enjoy up to 4K 60Hz performance that brings every play, move and scene to life with realistic clarity and motion.
- COLOR BOOSTER: Supercharge your color. From fiery reds to sparkling blues, make every color come to life with intensity. Color Booster transforms your content into a visual masterpiece.
- 4K UPSCALING: Upgrades what you watch to crisp 4K clarity. Upgrade your favorite shows, movies and more. Experience incredible details and clarity in every frame, even from lower-quality sources, with advanced upscaling technology.
What to do if a setting change does not help
- Change one relevant setting at a time. Use familiar content and the same input to judge whether the picture improves.
- Check the source and connection. Try another input or source if available, and make sure external connections are secure. A dim picture can have causes beyond settings; LG lists loose external connections and possible hardware issues among other possibilities.
- Restore the picture mode or reset picture settings if needed. Use the TV’s model-specific instructions, especially if you are unsure which adjustments changed.
- Use the manufacturer’s support instructions for your exact model. If the symptom persists after settings and connection checks, follow the official troubleshooting guidance or seek service rather than assuming a setting is the cause.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
