Seeing lines on your TV screen can be frustrating, but don’t worry — in many cases, it’s an easy fix! Whether the lines are vertical, horizontal, or flickering, follow these steps to troubleshoot and get your screen looking normal again.

Step 1: Check the Cable Connections

Loose or damaged cables are a common cause of screen issues.

Make sure all HDMI and power cables are securely connected

If using an external device (like a cable box or game console), try unplugging and reconnecting the HDMI cable

Test a different HDMI cable to rule out a bad connection

Step 2: Try a Different Input or Source

This helps determine whether the issue is with the TV or something connected to it.

Press the Input button on your remote and switch to a different HDMI source

Use a built-in app (like Netflix or YouTube) to see if the lines still appear

If the lines only appear with one device or input, the issue is likely with that device — not the TV.

Step 3: Power Cycle the TV

Sometimes, a quick reset can clear temporary glitches.

Turn off the TV and unplug it from the wall

Wait 30 seconds

Plug it back in and power it on

Step 4: Look for Physical Screen Damage

Carefully inspect the screen for cracks or pressure points. Damage like this can cause lines to appear and may require professional repair.

Step 5: Factory Reset (Last Resort)

If the lines continue and you’ve ruled out all other causes, try a factory reset:

Go to Settings > Device Preferences > Reset

Select Factory data reset

Follow the on-screen instructions (Directions may very based upon the TV's OS)

⚠️ This will erase your settings and downloaded apps — use this only if other steps didn’t help.

Still Seeing Lines?

If lines remain after trying all the steps above, your TV may need service. Please contact TCL Support for further assistance.