HDMI cables have a CEC (Simplink) function, enabling power control between products.
[2021 WebOS6.0] Press the button on your remote control and select [All Settings] → [General] → [[Devices] → [HDMI Settings] → [Simplink (HDMI-CEC)] → [On].
[2019 WebOS4.5] Press on your remote control and select [All Settings] → [Connection] → [HDMI Device Settings] → [Simplink (HDMI-CEC)] → [On].
[2018 WebOS4.0] or earlier Press on your remote control and select [All Settings] → [General] → [Simplink (HDMI- CEC)] → [On].
Try this
To enable [Auto Power] from the Settings menu
➔ Enable [Auto Power] in [2022 webOS22]
1. After turning on the TV, press the [Settings] button on the remote control.
From [Settings], select [All Settings].
2. From [General], select [Devices]
3. Select [HDMI Settings].
4. Enable or turn on the [Simplink (HDMI-CEC)].
➔ Enable [Auto Power] in [2020 webOS5.0]
1. After turning on the TV, press the [Settings] button on the remote control.
From [Settings], select [All Settings].
2. From [Connection], select [Device Connection Settings].
3. From [Device Connection Settings], set [Simplink (HDMI-CEC)] to On.
This guide was created for all models, so the images or content may be different from your product.