Turn an LG OLED On and Off Remotely: Wake-on-LAN, Quick Start+ and Simplink Explained

The short answer

For reliable remote power control, first decide which mechanism you are using. TV On With Mobile lets supported LG webOS TVs wake for ThinQ or a compatible controller. Wake-on-LAN (WoL) sends a network “magic packet” to the TV’s network interface. Quick Start+ changes how the TV enters standby so it can resume faster. Simplink is LG’s name for HDMI-CEC, which allows connected HDMI equipment to participate in power and input control.

They can influence the same symptom—“the TV turned on” or “the TV will not wake”—but they are not interchangeable. Enable only the mechanism you need and test after each change.

Four controls, four jobs

Feature	What it does	What it does not prove
TV On With Mobile	Allows supported mobile wake paths in standby	That arbitrary internet WoL will work
Wake-on-LAN	Wakes a listening network interface with a magic packet	That the TV will accept other commands while off
Quick Start+	Keeps a faster-resume standby state on supported models	That HDMI devices will power in the right order
Simplink (HDMI-CEC)	Exchanges control commands over HDMI	That local-network discovery is working

If a remote can turn the TV off but not on, pairing is usually not the first suspect. Off works while webOS is awake; on depends on standby networking or HDMI-CEC.

Start with TV On With Mobile

LG documents mobile power-on for TVs with webOS 3.5 and later. On older webOS versions, the mobile app may be able to turn the TV off but not back on. In LG’s webOS 6 example, the controls appear under All Settings → General → Devices → External Devices → TV On With Mobile, with Turn On via Wi-Fi and, on supported Android paths, Turn On via Bluetooth.

Treat that as an example, not a universal map. LG moves settings between generations and regions. Search the TV’s built-in user guide for “TV On With Mobile” if the path differs.

For iPhone, LG specifies Wi-Fi wake. Its current ThinQ instructions say Android can use Wi-Fi or Bluetooth on supported configurations. A third-party local controller normally depends on the Wi-Fi/LAN path, so Bluetooth wake in ThinQ does not validate network wake.

Wake-on-LAN without guessing the MAC address

WoL sends a magic packet addressed to a network interface’s MAC address. Use the address for the interface the TV actually uses. If the TV is on Wi-Fi, an Ethernet MAC copied from a label or router entry is the wrong target. LG’s support guidance specifically warns to use the TV’s Wi-Fi MAC rather than its Ethernet address in the documented Wi-Fi scenario.

A controlled test looks like this:

Pair and control the TV while it is on.

Record whether the TV is connected by Wi-Fi or Ethernet.

Obtain the matching MAC address from the TV or router.

Enable the supported mobile/network wake option.

Put the TV in normal standby with its own remote.

Send one magic packet from the same LAN.

If it fails, test the Quick Start+ interaction described below.

Do not forward WoL or TV-control ports from the public internet. For access away from home, use a properly secured VPN into your home network or an account-based vendor feature designed for remote access.

Quick Start+: faster resume, different standby behavior

LG describes Quick Start+ on webOS 6 and newer as a standby mode that permits faster startup. LG also notes that standby power consumption may increase. On one current support path, it appears under General → Devices → TV Management → Quick Start+; older guides show General → Additional Settings → QuickStart+.

Quick Start+ is not always the cure for WoL. LG’s WoL troubleshooting says you might need to disable Quick Start+. That is why contradictory forum recipes exist: the behavior can depend on model, firmware and the wake path being tested.

Test both states methodically:

Confirm wake three times with Quick Start+ on.

Change only Quick Start+ and place the TV back in standby.

Confirm wake three times with it off.

Keep the state that is reliable on your exact model and document it.

If Quick Start+ fixes slow startup but produces HDMI or network handshake faults, read the C3/C4 Quick Start+ handshake guide. Do not generalize a C3/C4 workaround to every generation.

Simplink: when another HDMI device is turning the TV on

Simplink is LG’s implementation of HDMI-CEC. With it enabled, a soundbar, console, streaming box or receiver can send power, input and control messages over HDMI. This is useful when starting an Apple TV should wake the display and select its input. It can also make power behavior seem random when several devices issue CEC commands.

LG’s recent example places Simplink under All Settings → General → Devices → HDMI Settings → Simplink (HDMI-CEC). Other generations use External Devices. The connected device also has its own CEC setting, often under a brand-specific name.

To isolate a mystery wake-up:

Disconnect or power down external HDMI devices.

Disable Simplink temporarily.

Test network wake and remote standby by themselves.

Re-enable Simplink.

Reconnect HDMI devices one at a time.

This distinguishes a CEC power message from a ThinQ or WoL packet. The same technique helps with input switching that occurs immediately after wake.

A symptom-led diagnostic tree

The TV turns off but will not turn on

Verify TV On With Mobile, the correct interface/MAC, and the Quick Start+ state. Keep the controller and TV on the same LAN during diagnosis.

The TV wakes when a console or streamer starts

That is likely Simplink/CEC behavior. Review power-sync settings on both the TV and source.

The TV wakes unexpectedly with nothing being used

Disable Simplink and mobile wake separately. Also review timers and automation routines. LG includes timers, Simplink, Quick Start+, WoL and Mobile On in its intermittent-power checklist because each can affect power state.

Wake works only shortly after shutdown

Retest after a fixed interval and compare Quick Start+ states. If the network interface disappears from the router, record the model, software, connection type and elapsed time for LG support.

Wake works on Wi-Fi but not Ethernet, or the reverse

Do not reuse one MAC address for both interfaces. Confirm which interface is active and which wake mode the model supports.

Safety, energy and support boundaries

Remote wake is a standby feature, not a reason to bypass electrical safety. Do not cycle mains power through an unverified smart plug as a substitute for graceful standby. Quick Start+ may increase standby energy use, and connected HDMI equipment can also remain in its own standby state.

OLED Control can send supported commands to a compatible, reachable LG webOS TV. It cannot make an unsupported network interface listen in standby, override router isolation or guarantee a firmware-specific CEC sequence. Start with supported models, then use first setup to validate normal control before testing wake.

Sources

LG: Intermittent power, Simplink, Quick Start+, WoL and Mobile On

LG: ThinQ setup and mobile power support

LG: QuickStart+ and startup behavior