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TV powers “off” on its own
It has been observed that some LG televisions randomly power “off” by themselves automatically. A common factor with most incident reported featured a BOSE sound bar connected to these LG televisions. Further customer incidents involved other peripherals featuring HDMI-CEC (Consumer Electronics Command) such as Amazon FireStick.
Try this
Although the issue is created by the external audio equipment, it directly affects the LG television in responding inadequately.
To resolve this issue, have the customer disable the BOSE sound bar’s “AUTO-OFF TIMER” function from their “BOSE SoundTouch” Mobile App.
Should you experience difficulties finding and disabling that function on your SoundTouch sound bar, please contact BOSE Customer Support.
Cause and Symptoms
>Incident replicated at the factory. It so happens that when a BOSE sound bar is connected to an LG TV and not being operated, LG TV AUDIO SOUND OUT option set to TV INTERNAL SPKR or HEADPHONE, after 20 minutes of viewing TV, the sound bar, being completely inactive, sends a HDMI CEC command to the television to go into “stand-by” mode, therefore powering “off” the TV.
The BOSE sound bar features “AUTO-OFF TIMER” function which through HDMI connectivity and CEC commands instruct all interconnected peripherals to shut down if sound bar inactivity has been detected after 20 minutes.
Note : To disable the auto-off, use the SoundTouch app.
Other notable factors causing TV to turn off on its own:
>The power turns off suddenly
- Check if Power Off Timer is set.
- The TV will turn off automatically if you do not press any buttons for 4 hours even if after TV was turned on at the time set by Reminder or Power On Timer.
- There is also a chance that the internal protection circuitry was activated on account of product’s internal temperature having suddenly risen unusually or excessively.
My USB storage device is not recognized when connected
- Check whether USB storage device is supported by the TV.
- For more information, see Connecting External Devices Connecting USB in User Guide .
- You may need to connect the USB storage device to an external power source using its own power adapter. An electrostatic discharge risks causing the USB storage device to malfunction. In this case, try unplugging and plugging USB device back in again. If the TV will not recognize the connected USB storage device, USB cable could be faulty. Replace the cable and try once more.
Power Off Timer
- Set Power Off Timer to On.
- The TV will turn off at the set time.
Auto Power Off after 4 Hours
If you do not press any button for 4 hours after the TV is turned on by a feature such as Power On Timer , the TV will get turned off automatically. To ensure the TV does not automatically turn off set Auto Power Off after 4 Hours to Off. Some models may not support this option.
Quick Start+
- This setting puts your TV in standby mode when it’s turned off so it will help using TV’s functions quicker when you turn TV back on.
- Set Quick Start+ to On .
- Some models may not support this option. Turning this option “ON” may increase energy consumption while possibly triggering adverse effects such as intermittently turning TV On/Off.
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>This guide was created for all models, so the images or content may be different from your product.