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No Signal

TCL Roku TV

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

TCL Roku TV 'No Signal' — How to Fix It

What it means

'No Signal' on a TCL Roku TV means the TV is on the right kind of input but isn't getting a picture from it.
The usual reasons are simple: the TV is set to the wrong HDMI port, the HDMI cable has worked loose, the device plugged into that port is off or asleep, or for antenna users, the aerial isn't connected or the channels haven't been tuned.
This is almost always a connection or input problem, not a fault with the TV itself.

Affected Models

  • TCL 3-Series Roku TV (S3xx)
  • TCL 4-Series Roku TV (S4xx, including 43S455, 50S455, 55S455, 65S455)
  • TCL 5-Series Roku TV (S5xx)
  • TCL 6-Series Roku TV (R6xx, R7xx)
  • Older TCL Roku models (32S3xx, 43S3xx, 55S4xx)

Common Causes

  • Wrong input selected (HDMI 1 vs HDMI 2 vs Antenna TV)
  • HDMI or antenna cable loose at the TV or at the device
  • Connected device — cable box, console, streaming stick — turned off or asleep
  • Faulty or cheap HDMI cable, especially for 4K sources
  • Antenna not connected, or channels never tuned in
  • HDMI handshake glitch after the TV or the device was rebooted
  • Auto power-saving on the source device kicked in

How to Fix It

  1. Switch to the right input.

    Press the Home button on the Roku remote, then go to the input tile on the home screen for the port your device is actually plugged into — HDMI 1, HDMI 2, HDMI 3, or Antenna TV.
    Picking the wrong input is the single most common cause of 'No Signal'.

  2. Reseat the cables.

    Unplug the HDMI cable at both ends and push it firmly back in.
    Try a different HDMI port on the TV.
    If you have another HDMI cable handy, swap it in — a failing cable causes intermittent dropouts, especially with 4K signals.

  3. Check the source device is actually on.

    Make sure the cable box, console, or Blu-ray player is awake — its own power light should be on and it should respond to its own remote.
    If it's a streaming stick, confirm the stick has power (most need their supplied USB adapter, not the TV's USB port).

  4. Power-cycle the TV and the device.

    Turn the TV off and unplug it from the wall for 60 seconds.
    Turn the source device off too.
    Plug the TV back in, turn on the source device first, then the TV, then select the input.
    This clears a stuck HDMI handshake — a common cause after either box was restarted.

  5. Retune channels (for antenna TV).

    If 'No Signal' is on the Antenna TV input, check the coax cable is firm in the TV's RF socket.
    Then run a channel scan: Settings > TV inputs > Antenna TV > Scan again for channels.
    Antenna signals also need a decent aerial position — a flat indoor aerial buried behind furniture often won't pick anything up.

  6. Test the device on a different TV.

    If you've tried different cables and ports and the TV still says 'No Signal' from a device you know is on, plug that device into a different TV or monitor.
    If it works there, the TV's HDMI port may be failing.
    If it doesn't, the device is the problem.
    For an in-warranty TV with multiple bad ports, contact TCL support.

Frequently Asked Questions

Why does my TCL Roku TV say 'No Signal' on HDMI even with the cable plugged in?

Most often it's the wrong HDMI port — the cable is in HDMI 2 but the TV is showing HDMI 1.
After that, the usual culprits are a sleeping source device, a stuck HDMI handshake (clear it by unplugging the TV for a minute and powering everything back on in the order: source first, then TV), or a marginal HDMI cable.
If only your 4K device fails, a cheap or short HDMI cable is often the cause — try a known-good HDMI 2.0 or 2.1 cable.