Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsBefore replacing a TV, check whether the problem is a dim picture, brightness that changes on its own, or motion that looks unnaturally smooth. Energy-saving, ambient-light and motion-processing controls can produce those symptoms. Their names and availability vary by TV, so use the labels below as things to look for—not universal menu instructions.
First, identify what looks wrong
- Dim all the time: Start with energy-saving options and picture mode.
- Brightness shifts by itself: Look for automatic brightness, a light sensor or adaptive picture features.
- Movies look too smooth: Check motion smoothing or interpolation.
These settings are plausible causes, not proof that the TV is healthy. A setting change is a useful first check, not a diagnosis.
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If movies look unnaturally smooth
Motion processing can add or generate frames to make movement appear smoother. Some viewers dislike the resulting “soap-opera” look in films. Look for a motion control such as Action Smoothing, Motion Smoothing, Motionflow or Picture Clarity; names and options vary by brand and model.
Try turning the motion effect down
On supported Roku TVs, Roku’s motion-smoothing guidance calls the control Action Smoothing and recommends Off or Low for movies to avoid the soap-opera effect. Not all third-party Roku TV models offer all motion options. For another brand, use its own support instructions or search picture settings for a motion-related control rather than assuming Roku’s label applies.
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Watch a familiar film scene after changing the setting. If you prefer the original look, keep the effect off or low for that content; if you prefer smoother motion, you can restore a higher level.
If the picture is consistently dim
Check energy-saving features and picture mode before concluding that the screen has failed. LG USA Support says, as general guidance for the models covered by its instructions, “If the screen on your LG TV looks dark or dim, it is usually because [Energy Saving] is turned on or [Picture Mode] is not set correctly.” LG’s dark-picture troubleshooting guide recommends setting Energy Saving Step to Off and Picture Mode to Standard, then offers picture reset as a further step.
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Those are LG-specific recommendations, not universal best settings. Other TVs may use labels such as Eco or Power Saving, and the choices available depend on the model. Picture settings can also differ by input on LG TVs, so check the source where the dim picture occurs. A picture reset can undo personal adjustments, so try the simpler checks first and consult the model’s instructions before resetting.
If brightness changes without you touching the controls
Some TVs deliberately adjust the image in response to room light or power-saving behavior. Look for an ambient-light sensor, automatic brightness, brightness optimization, adaptive picture or energy-saving feature. The exact label and menu location vary.
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- Samsung: Samsung UK explains that Brightness Optimization can adjust picture brightness according to ambient light and lists energy-saving features among the causes to check when brightness changes automatically. See its automatic-brightness troubleshooting guide.
- Sony: Sony describes its light sensor as adjusting brightness to ambient light. Sony’s guidance also covers Auto Picture Mode and picture-setting reset; consult the Sony support article and the Sony Help Guide for applicable models.
- LG: For brightness that changes intermittently, LG recommends checking picture settings and notes that behavior may vary by input mode. See LG’s intermittent-brightness guidance.
Turning off an adaptive feature may stop the automatic changes, but it also removes the adjustment the TV was designed to make. If the picture looks better without it, that may be your preference; if you value automatic adaptation or energy saving, you may prefer to leave it on.
Change one thing at a time, then check the source
- Open your TV’s picture or display settings and find the control that matches the symptom. Menu paths differ by manufacturer, model and software version; use the TV’s manual or official support page for the exact route.
- Change one setting, then replay the same scene or view the same source. This makes it easier to tell whether that control affected the picture.
- If the result is worse, restore the previous value. If needed, use the TV’s picture reset for the relevant mode, bearing in mind it may clear your adjustments.
- Check whether the problem occurs on another input or source. A setting may apply only to one input; LG specifically notes input-related differences in picture settings.
- Inspect external connections and follow the manufacturer’s model-specific troubleshooting if the symptom persists. LG lists loose external connections and possible hardware issues among other causes of a dim screen.
When settings are not enough
If dimness, unexplained brightness changes or other picture problems remain after checking relevant settings, sources and connections, do not assume that another adjustment will fix the TV. Use the official support page for the exact model or seek service. The controls discussed here can rule out some common causes, but they cannot establish that the display hardware is working properly.
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.
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.
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