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COMMON DEVICE ISSUE · NOT AN ERROR CODE

Samsung TV has lines, spots or bands on screen

Use the TV picture test to distinguish source problems from panel faults.

✓ Manufacturer source✓ Safe checks✓ Verification and escalation
Samsung · Television10 November 2026 · source checked
UNDERSTAND THE ISSUE

What might cause this?

Similar symptoms can have different causes across models and software versions. These are possibilities, not a diagnosis.

Possible causes

  • The HDMI cable or external source may be faulty.
  • Picture settings or software may be involved.
  • The panel or display hardware may be defective.
  • An individual app may have a video-processing issue.
Open official manufacturer document ↗
SAFE CHECKS IN ORDER

What can you try?

Try these safe, user-level checks in order; do not open the device. Menu labels may differ by version.

  1. 01

    Step 1

    Compare whether the defect appears in channels, apps and the TV’s own menus.

  2. 02

    Step 2

    Disconnect external HDMI sources safely and inspect the built-in TV display.

  3. 03

    Step 3

    Run the Samsung Picture Test from the model’s Device Care/self-diagnosis menu.

  4. 04

    Step 4

    If the test picture is clean, try a different HDMI cable or source device.

  5. 05

    Step 5

    If the test itself shows lines, do not open or press on the panel.

CHECK THE RESULT

How can you confirm the fix?

If the defect appears on the built-in test image, photograph it for the service request.

WHEN TO SEEK PROFESSIONAL HELP

When should you contact service?

If the panel test fails, contact Samsung authorised service instead of opening the TV.

⚠ Stop using a device if it overheats, shows liquid damage, smells burnt or has a swollen battery.

POTENTIAL COST

Will a repair cost money?

Settings, cables and user checks may require no repair. Hardware costs depend on the exact model, warranty and service diagnosis; no fixed price is promised.

FREQUENT QUESTIONS

Quick answers

Could these checks affect warranty?

Use only external checks recommended for end users by the manufacturer. Opening batteries, electronics or sealed parts can create safety and warranty risks.

What if the steps do not help?

Write down your model, software version and test results. Share those details with official support rather than repeating potentially unsafe actions.

Official manufacturer source

How was this sourced?

This is an original summary of the manufacturer support document; use the official page for current, model-specific instructions.

Open official manufacturer document ↗

Features and model coverage vary. Compare the source with your exact model.