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How to Turn Your TV and HDMI Devices On and Off Together — LG Help

To turn your TV and an HDMI-connected device, such as a set-top box or soundbar, on or off together, set Simplink (HDMI-CEC) or Auto Power Sync to On in your TV settings.

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TroubleshootingTVs

What to Check First

  1. When you enable CEC (Consumer Electronics Control), devices connected through HDMI can exchange power control signals and turn on or off together.
  2. Your TV and external device operate independently by default, so they do not share power control signals unless HDMI-CEC is enabled.
  3. 2026 and later TVs (webOS 26 and later): Press the Settings button on your remote, then select All Settings, System, Devices, HDMI Settings, and Simplink (HDMI-CEC). Set it to On.
  4. 2022 and later TVs (webOS 22 and later): Press the Settings button on your remote, then select All Settings, General, Devices, HDMI Settings, and Simplink (HDMI-CEC). Set it to On.
  5. 2021 TVs (webOS 6.0): Press the Settings button on your remote, then select All Settings, General, Devices, HDMI Settings, and Simplink (HDMI-CEC). Set it to On.
  6. 2019 and later TVs (webOS 4.5 and later): Press the Settings button on your remote, then select All Settings, Connection, and HDMI Device Settings. Set both Auto Power Sync and Simplink (HDMI-CEC) to On.
  7. 2018 and earlier TVs (webOS 4.0 and earlier): Press the Settings button on your remote, then select All Settings and General. Set both Simplink (HDMI-CEC) and Auto Power Sync to On.
  8. On webOS 6.0 and later, Auto Power Sync does not appear as a separate setting. TurningF on Simplink (HDMI-CEC) automatically enables linked power control.
  9. To turn your TV and an HDMI-connected device, such as a set-top box or soundbar, on or off together, set Simplink (HDMI-CEC) or Auto Power Sync to On in your TV settings.
  10. On your TV remote, press the [Settings] button, shown as a gear icon, or the [Mute] button three times in a row.

Why This Can Happen

Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.

Safety and Model-Specific Guidance

Stop troubleshooting if you notice burning, electrical damage, unsafe heat, gas odor, refrigerant concerns, or water near electrical components. Follow the official LG USA instructions for your exact model.

Frequently Asked Questions

What should I check first for How to Turn Your TV and HDMI Devices On and Off Together?

When you enable CEC (Consumer Electronics Control), devices connected through HDMI can exchange power control signals and turn on or off together.

When should I stop troubleshooting and contact LG?

Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.

Does this guidance apply to every LG model?

Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.

Related LG Products

These model pages are linked because the stored category or exact model matches this Help Library topic.

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Read the Official LG Guide