TV Has Dark Spots or Cloudy Patches: What They May Mean

Dark spots, cloudy patches or uneven brightness on a television can come from the program being watched, a picture setting, pressure on an LCD panel, ordinary screen-uniformity limitations or a fault inside the television. The appearance alone does not prove that the panel needs replacing.

Work through the following checks in order. The most useful question is whether the mark appears in the television’s own menus and built-in picture test as well as normal content.

Before you begin

Do not press, rub or “massage” a dark spot. Do not remove the rear cover or attempt to reposition backlight components. A television can contain dangerous voltages even after it has been disconnected, and pressure can permanently damage the panel.

Turn the television off, disconnect it from power if safe to do so and arrange professional assistance if you notice:

• A burning smell, smoke, crackling or unusual electrical noise.
• Unusual heat around the screen, plug, cable or power point.
• A bulging or separating screen or rear cover.
• Liquid damage.
• A damaged power cable or plug.
• A patch that appeared after an impact, fall or cracked screen.

Describe exactly what you can see

Before changing settings, photograph the problem and write down when it is visible. Useful descriptions include:

• A soft grey or white cloud on a black scene.
• A darker circular patch visible on bright scenes.
• Bright light leaking from an edge or corner.
• Vertical bands or a dirty-screen appearance during camera pans.
• A sharply defined black area.
• A faint logo, scoreboard or menu left behind.
• A coloured blotch or rainbow-like pressure mark.
• A stain visible even when the television is off.

Note whether the mark is fixed in the same screen position, changes with viewing angle, follows the content or disappears when a different source is selected.

Check whether the mark is on the outside of the screen

Turn the television off and inspect it in ordinary room light. Fingerprints, cleaning residue and reflections can resemble cloudy patches, particularly on glossy or anti-reflective coatings.

Follow the cleaning instructions for the exact model. In general, use a clean, soft, dry microfibre cloth and wipe very gently. Do not spray liquid directly onto the television. Avoid window cleaner, alcohol, abrasive products, paper towel and excessive moisture unless the manufacturer specifically approves them.

If a mark is visible on the outer surface while the television is off and does not change after approved gentle cleaning, the screen coating may be damaged. Do not scrub harder.

Do not press or massage an LCD panel

Internet advice sometimes suggests rubbing a dark spot or pushing around the bezel. Do not do this. Sony advises avoiding pressure while wiping because pressure can temporarily disturb the liquid-crystal alignment and appear as spots or marks.

Pressure can also damage the layers, coating or pixels, turn a temporary mark into a permanent one and complicate a warranty or consumer-guarantee claim. If moving the television is necessary, use the handling points and number of people specified by the manufacturer; never lift it by squeezing the screen.

Check several types of content

Test material from more than one source:

• The television’s Home or Settings screen.
• A free-to-air channel.
• A built-in streaming app.
• A different HDMI device, if available.
• A bright, varied program rather than only a blank test screen.

If the patch appears in only one program, camera shot, app or HDMI source, the television panel may be fine. Compression, shadows in the original recording, game effects, video-range mismatches and source-device settings can all create apparent blotches.

If the mark stays in exactly the same physical place over the television’s own menus and every source, the problem is more likely to be within the television.

Run the television’s built-in picture test

Many televisions include a Picture Test, Screen Test, Self Diagnosis or Picture/Sound Test. Samsung, for example, provides Picture Test through Device Care and Self Diagnosis on supported models. Sony provides a picture and sound test on supported Google TV and Android TV models.

1. Open the normal Support, Help, Device Care or Self Diagnosis menu.
2. Choose the built-in picture test.
3. Examine the test image from your normal viewing position.
4. Photograph the result if the patch is visible.
5. Follow the on-screen recommendation for the exact model.

If the patch is absent from the built-in test, investigate the affected app, HDMI cable, source device or program. If it is visible in the test, changing the HDMI cable is unlikely to fix it.

Understand LCD clouding and backlight bleed

LCD, LED, QLED and Mini LED televisions all use a liquid-crystal panel with a light source behind or around it. On very dark images in a dark room, some sets show:

• Soft pale clouds across the screen.
• Brighter corners or edges.
• Uneven black levels.
• Halos around bright objects on dark backgrounds.

Sony notes that some uneven brightness on an LCD television can be visible in a dark environment with no input or a blank screen and may be normal rather than a malfunction. The amount varies by panel design, backlight system, local-dimming zones, picture settings and viewing conditions.

Do not judge the television solely from an overexposed phone photograph of a completely black test slide. Phone cameras often lift shadows and exaggerate clouding that is far less visible to the eye.

Clouding versus a backlight or diffuser fault

Mild, soft unevenness that has existed since new and is mainly visible on black test screens may be a panel characteristic. A fault becomes more plausible when:

• A new patch appears suddenly or continues to worsen.
• A section remains clearly darker during normal bright programs.
• There are distinct bright circles or lens-shaped points.
• One side or strip of the television is much darker than the rest.
• The brightness changes after warming up.
• The patch flickers or follows a repeating pattern.

These symptoms can involve failed backlight LEDs, displaced or heat-damaged diffuser components, a power or control fault, or damage within the panel assembly. The precise cause requires inspection; do not order parts from appearance alone.

What dark circular spots may mean

A fixed dark circle or oval on an LCD television can result from pressure damage, contamination or separation within the optical layers, a failed part of the backlight, heat damage or physical panel damage. Several regularly spaced dark areas may point towards part of the backlight system, but a photograph cannot confirm the component.

If a dark spot appeared after the screen was pushed, struck, transported flat or gripped during installation, stop applying pressure and document the condition. Physical panel damage is generally not corrected by settings or a factory reset.

What a sharply black patch may mean

A sharply defined black region, spreading ink-like mark, coloured fracture pattern or area next to a crack usually indicates panel damage rather than ordinary clouding. The outer glass or coating can sometimes look intact even when internal panel layers are damaged.

Do not continue moving or flexing the television. Photograph the entire screen, the affected area, the bezel and any packaging or installation damage. Contact the retailer, installer, delivery company or manufacturer as appropriate.

Check for pressure from the installation

Uneven pressure or chassis twist can affect a thin television. Consider whether the symptom began after wall mounting, moving or reassembling the stand.

• Confirm that the mount is approved for the television’s size and weight.
• Check that the correct screw locations and manufacturer-specified screw lengths were used.
• Make sure no cable, bracket or object is trapped behind the set.
• Check from a distance whether the chassis appears twisted or bowed.
• Do not loosen structural screws or dismantle the television yourself.

If an installer mounted the television and the fault appeared immediately afterwards, document it before anyone changes the installation.

Understand dirty-screen effect and vertical banding

A screen can look slightly dirty, streaky or banded when displaying a uniform colour, especially during slow camera pans across football fields, ice, sky or grey backgrounds. This is commonly called dirty-screen effect or panel-uniformity variation.

Slight variation may be a characteristic of an LCD or OLED panel. It becomes more concerning when the bands or blotches are obvious in varied everyday content from the normal seat, appeared suddenly, or are severe enough to distract from ordinary viewing.

Use normal content when deciding whether the issue is meaningful. Running hours of extreme test slides can make a minor characteristic seem more important than it is.

OLED screens behave differently

OLED televisions do not use a conventional LCD backlight. Dark spots, bands or cloudy-looking areas can instead involve near-black uniformity, temporary image retention, pixel ageing, panel damage or the panel’s compensation process.

Sony notes that slight lines or bands may be visible in dark scenes on OLED displays because of small brightness differences, and that this can be within the product’s standards. However, a prominent new fixed patch visible in normal content still deserves proper testing.

Check whether it is temporary image retention

If the “patch” resembles a channel logo, scoreboard, game display, news banner or app menu, it may be image retention rather than clouding.

• Temporary image retention may fade after varied content and the television’s automatic compensation cycle.
• Permanent burn-in or uneven pixel ageing remains visible and may require panel service or replacement.

Stop displaying the static item, return the television to normal varied viewing and allow the manufacturer’s automatic panel-care process to operate. Do not run looping “burn-in fixer” videos at maximum brightness; they cannot restore permanently aged pixels and may add more use.

Let automatic OLED panel care finish

OLED televisions commonly run short compensation or calibration routines automatically after use when they are turned off with the remote but remain connected to power. Sony says automatic panel calibration can occur several hours after the television is turned off.

Do not routinely switch the television off at the wall immediately after every viewing session unless the manufacturer instructs otherwise. Leave normal panel-protection features enabled.

Do not repeatedly run manual panel refresh

Some OLED televisions provide Pixel Cleaning, Panel Refresh or a similarly named manual process. This is not a general-purpose cleaning button and should not be run repeatedly.

Use a manual process only when the exact model’s instructions or support team recommends it for the observed symptom. Keep the television on reliable power and do not interrupt the process. If the mark remains after the approved procedure, document the result and contact support rather than running it over and over.

Temporarily reduce settings that exaggerate clouding

For LCD clouding that is mainly visible in a dark room, test moderate settings:

• Choose a normal, Cinema or Filmmaker-style picture mode rather than Vivid or Dynamic.
• Reduce Backlight, Panel Brightness or Peak Brightness to a comfortable level.
• Enable or compare the normal local-dimming setting if the television supports it.
• Turn off extreme contrast-enhancement settings for comparison.
• Check whether an ambient-light or energy-saving feature is changing brightness unexpectedly.

Record the original settings first. These adjustments may make ordinary LCD unevenness less visible, but they do not repair a failed backlight or damaged panel.

Understand local-dimming halos

On a full-array or Mini LED television, a bright object such as white subtitles, stars or a mouse pointer can illuminate a backlight zone and create a pale halo on the surrounding black area. This blooming moves with the bright object and is different from a fixed cloudy patch.

Compare local-dimming settings and view from the normal seat. Blooming often looks stronger from an angle or through a phone camera. If a bright or dark patch stays fixed regardless of the image, investigate further.

Restart before resetting anything

A restart may clear a temporary processing or dimming-control problem.

1. Use the television’s Restart option if available.
2. Otherwise follow the manufacturer’s approved power-reset instructions.
3. Disconnect external HDMI and USB devices for the test.
4. After startup, run the built-in picture test again.

Do not disconnect power while software or panel maintenance is running. A factory reset should not be an early step: it removes settings and accounts but cannot repair physical pressure damage, failed LEDs or a damaged panel.

Check for a software update

Install updates only through the television’s built-in updater or the official Australian support page for the exact model. Software can affect local dimming, picture processing and panel-care operation.

Keep the television on stable power while updating. Restart it afterwards and repeat the same picture test. If the patch is physical and fixed, an update may make no difference, but recording the result helps support rule out software.

Test from the normal viewing position

LCD black levels and uniformity can change noticeably when viewed from above, below or off to one side. Stand directly in front of the centre, then sit in the normal position and compare.

If the cloud moves or changes substantially with your position, viewing-angle characteristics may be involved. If it remains locked to the same pixels in all positions and sources, an internal issue is more likely.

Document the problem properly

Good evidence makes a retailer or manufacturer assessment easier:

• Photograph the whole television and the affected area.
• Take a short video showing the patch across the Home menu, picture test and normal content.
• Use a normal exposure that resembles what your eyes see.
• Include one daylight-room image and one normal evening-viewing image.
• Record the exact model, serial number, purchase date and software version.
• Note when the mark began and whether the television was moved or mounted.
• Record the picture mode and brightness or backlight setting.

Do not edit the photos to exaggerate the defect. A camera’s automatic night mode can make LCD clouding appear much worse than it looks in person.

When to contact the retailer or manufacturer

Arrange assessment when:

• A new television has distracting patches in normal content.
• A fixed patch appears in the built-in picture test.
• The problem appeared suddenly or is spreading.
• One strip, side or large section is consistently darker.
• Bright circles, flickering zones or repeated backlight patterns are visible.
• An OLED retains a prominent image after the approved panel-care process.
• The panel or chassis is warped, separating or unusually hot.
• The television was damaged during delivery or professional installation.

Contact the retailer promptly for a new or recently delivered television. Avoid paying an unauthorised repairer before the retailer or manufacturer has had a reasonable opportunity to assess a possible warranty or consumer-guarantee claim.

Australian consumer guarantees may apply

A manufacturer’s written warranty is not the only protection. Under Australian Consumer Law, products come with consumer guarantees, including that they be of acceptable quality. These rights apply automatically and may continue for a reasonable time beyond a stated manufacturer’s warranty, depending on the product and circumstances.

The appropriate remedy can depend on whether the problem is major or minor and whether it resulted from misuse or accidental damage. Keep the receipt, delivery records, photographs and written correspondence. The retailer cannot simply remove automatic consumer-guarantee rights with a store policy.

When repair may not be economical

On an older television, a backlight repair may be economically sensible if the LCD panel itself is undamaged and parts are available. A complete panel replacement is often expensive relative to the value of the television, particularly for large screens.

Ask for a written diagnosis and quote that identifies whether the fault is in the backlight, diffuser assembly, control electronics or panel. Also ask about parts availability, labour warranty and transport risk before authorising work.

What to tell support

• The exact model and serial number.
• The television’s age and purchase details.
• Whether it is LCD/LED, Mini LED, QLED or OLED.
• Whether the patch appears in the Home menu and built-in picture test.
• Whether it affects every app, channel and HDMI input.
• Whether it is visible during normal content or only a black test image.
• Whether it changes with viewing angle, brightness or local dimming.
• Whether it appeared after transport, mounting, impact, cleaning or a software update.
• Whether a restart and official update were completed.
• Whether approved OLED panel care was allowed to finish.
• Whether the condition is stable, intermittent or worsening.

The bottom line

Dark spots and cloudy patches do not all have the same cause. Mild LCD clouding on a blank dark screen can be a normal uniformity limitation, and Mini LED blooming can move with bright objects. A fixed patch visible in the television’s own menu and picture test is more likely to involve the panel, backlight, diffuser or physical pressure.

First inspect the outer screen without pressing it, compare several sources and run the built-in picture test. Test sensible picture settings, restart the television and document the result under normal viewing conditions. For OLED, distinguish image retention from general unevenness and allow the automatic panel-care process to work.

Do not massage the screen, open the television, repeatedly run manual OLED refresh cycles or factory-reset it expecting physical damage to disappear. If the mark is new, distracting in ordinary content, worsening or visible in the built-in test, contact the retailer or manufacturer and preserve your Australian consumer-guarantee rights before paying for repair.

Useful official resources

• Sony Australia — cloudy white shadows or bright spots on an LCD television
• Sony Australia — care for an OLED or LCD television without damaging the screen
• Samsung Australia — perform a television picture test
• Sony Australia — perform a picture and sound test
• Sony Australia — lines or bands in dark scenes on OLED televisions
• Sony Australia — OLED image-retention precautions and panel care
• LG Australia — television image retention and burn-in guidance
• ACCC — Australian consumer rights and guarantees

Information and official support references checked 12 August 2026. Panel behaviour, picture-test menus, cleaning instructions and OLED maintenance procedures vary by brand and model. Follow the instructions for your exact Australian television.