If your TV switches to an HDMI input even though you did not use the remote, it may be responding to a signal from a connected device, such as a set-top box, soundbar, or game console. This can happen even when the connected device is in standby mode. You can change the settings to prevent the TV from switching inputs automatically.
Why Does Your TV Switch Inputs by Itself?
- SIMPLINK (HDMI-CEC) may allow a connected device to switch the TV’s input automatically.
- A connected device may send a signal while it is in standby mode, causing the TV to switch inputs.
- The TV may have encountered a temporary issue with the saved device connection information.
How to Stop Your TV From Switching Inputs Automatically
Step 1. Turn Off SIMPLINK (HDMI-CEC)
Check Your TV’s webOS Version
• On your TV remote, press the Settings (gear icon) or Mute button three times in a row.
- Turn off Simplink to prevent the TV from automatically switching inputs when it detects a signal from a connected device.
- 2026 and later TVs (webOS 26 and later): Press Settings on the remote, then select All Settings, System, External Devices, HDMI Settings, and HDMI Deep Color.
- 2021 and later TVs (webOS 6.0 and later): Press Settings on the remote, then select All Settings, General, External Devices, HDMI Settings, and HDMI Deep Color.
- 2020 and earlier TVs (webOS 5.0 and earlier): Press Settings on the remote, then select All Settings, Picture, Additional Settings, and HDMI Ultra HD Deep Color.
Step 2. Turn Off Quick Start+
- Turn off Quick Start+ to allow your TV to turn off completely instead of remaining in standby mode, which reduces incorrect input detection.
- 2026 and later TVs (webOS 26 and later): Press Settings on the remote, then select All Settings, System, Additional Settings, and Quick Start+, then select Disable.
- 2023 and later TVs (webOS 23 and later): Press Settings on the remote, then select All Settings, General, System, Additional Settings, and Quick Start+, then select Disable.
- 2021 and later TVs (webOS 6.0 and later): Press Settings on the remote, then select All Settings, General, Devices, TV Management, and Quick Start+, then select Disable.
- 2020 TVs (webOS 5.0): Press Settings on the remote, then select All Settings, General, Additional Settings, and Quick Start+, then select Disable.
- 2019 and earlier TVs (webOS 4.0 and earlier): Press Settings on the remote, then select All Settings, General, and Quick Start+, then select Disable.
Step 3. Delete All Connection History
- Delete your saved connection data to reset how the TV recognizes connected devices.
- 2026 and later TVs (webOS 26 and later): Press Settings on the remote, then select All Settings, System, External Devices, and Delete Connection History.
- 2021 and later TVs (webOS 6.0 and later): Press Settings on the remote, then select All Settings, General, External Devices, and Delete Connection History.
Step 4. Still Need Help?
If the issue persists after following the steps above, you can get further support through LG Chatbot on our website or by requesting a technician visit.
Frequently Asked Questions
- Q. Why should I turn off SIMPLINK (HDMI-CEC)?
- A. Turning off Simplink prevents connected devices, such as game consoles, soundbars, and streaming boxes, from sending a signal to change your TV input.
- Q. What does deleting the connection history improve?
- A. Deleting the connection history resets the device and network data saved on your TV, which helps it correctly recognize connected devices again.
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This guide is based on standard models. The settings menu may vary by model.
