If your LG TV turns on by itself, the fix is usually found in the settings and remote power behavior—most often an enabled HDMI-CEC (Simplink) or a misbehaving remote/battery trigger. This guide walks you straight through the quickest checks to stop spontaneous startup, including what to disable and how to confirm the TV isn’t receiving unintended commands. Follow these steps in order and you’ll know exactly which setting or device is causing the problem.
If your LG TV powers on by itself, the fix is usually to disable the most common “auto power” wake triggers—especially HDMI-CEC (Simplink), any “Auto Power On” options, and motion/voice/network wake features. Start by isolating which connected device or signal is waking the TV, then power-cycle the TV and re-test with external inputs removed—this narrows the cause quickly.
This guide is for LG TV owners (webOS models and older LG smart TVs) who see the TV power on without pressing the remote, including cases where it happens at night, after plugging in, or right after using a connected console/streaming box.
Quick checks that often solve it fast
You can often stop random LG TV power-ons in minutes by removing external wake sources and checking the remote for stuck buttons. When an LG TV is turning on by itself, “isolation testing” (change one thing at a time) is the fastest route—start with the simplest likely triggers first.
Unplugging or powering off HDMI devices (console, streaming stick, soundbar/receiver) is a practical way to determine whether HDMI-CEC or device power commands are waking an LG TV.
Switching the LG TV to a non-HDMI source helps confirm whether the wake behavior is driven by a TV setting/signal/network rather than an external HDMI handshake.
Checking remote batteries and removing suspected stuck buttons is a legitimate diagnostic step because remotes can send power/app/voice commands that wake webOS.
Do these checks in this order
1. Remove external devices (best first step). Power off or unplug: set-top box, soundbar, gaming console, streaming stick, and any HDMI switch. Then wait and watch whether the LG TV stays off.
2. Test with a “non-trigger” input. Turn the LG TV on, then switch to an input you aren’t using (for many homes this is a built-in app input or an analog input, but the key is “not HDMI from a device”). If the TV still powers on by itself, the cause is more likely internal TV settings or network behavior.
3. Inspect the remote. Replace/rotate batteries and check for stuck buttons (common culprits: Power, microphone/voice button, and any “quick access” app keys). An unresponsive or jammed remote can appear like “someone pressed power.”
From my experience writing troubleshooting workflows for consumer electronics, the “external-device first” path usually resolves the mystery quickly—
Three technical anchors (to understand what you’re isolating)
– HDMI cables carry a dedicated CEC (Consumer Electronics Control) signal line; on HDMI Type-A, CEC is associated with pin 13—so a single powered device can legitimately trigger system behavior.
– HDMI Type-A uses a 19-pin connector; the presence of standardized signaling paths is why HDMI-CEC/“Simplink” exists and can wake TVs.
– CEC is designed for device-to-device control; when enabled, it can send system standby and system wake-related commands across compatible equipment.
Disable HDMI-CEC and “device control” wake-ups
The most common reason an LG TV turns on by itself—especially right after powering on a console—is HDMI-CEC (on LG, often branded Simplink). Disabling CEC/device control stops the “connected device pulls the TV out of standby” behavior.
On LG TVs, HDMI-CEC is commonly exposed as “Simplink”/“HDMI-CEC,” and it can allow connected devices to control TV power.
If your LG TV wakes immediately after turning on a console or streaming box, the wake path is often HDMI-CEC rather than a random TV fault.
CEC-related troubleshooting is safest when you change only one control family (CEC) and retest with all other auto features left alone.
Where to change it (LG webOS + older LG models)
The exact wording varies by model, but look for one of these paths inside Settings:
– Simplink (HDMI-CEC) / HDMI-Device Control
– Device Connector
– HDMI-CEC (sometimes under “General” or “External Devices”)
Turn CEC Off, then retest with only power applied to the TV (no HDMI devices). If the problem stops, HDMI-CEC was almost certainly the trigger.
If you use a soundbar/receiver
If your LG TV powers on via HDMI-CEC, the soundbar/receiver may be the “middleman” sending commands back to the TV. Check that device’s settings for:
– “HDMI-CEC,” “BRAVIA Sync,” “Simplink,” “System Control,” or “Power Sync”
– “Standby sync” / “CEC standby”
You don’t always have to abandon audio convenience—many setups work best with CEC disabled for power/wake while keeping only volume/audio control available (depending on the hardware model).
Common Causes of “LG TV Turns On By Itself” (Fix Priority & Side-Effect Risk)
| # | Wake trigger type | Typical symptom | What to disable on LG | Expected fix impact |
|---|---|---|---|---|
| 1 | HDMI-CEC / Simplink | TV wakes when console/box turns on | “Simplink (HDMI-CEC)” / “HDMI Device Control” | ★★★★☆ |
| 2 | Auto Power On | TV powers up after plugging in / at night | “Auto Power On” = Off | ★★★☆☆ |
| 3 | Quick Start / power-saving behavior | TV wakes after network/signal changes | Quick Start / power saving mode = adjust | ★★★☆☆ |
| 4 | Network wake / remote app control | TV wakes while you’re away | Network/remote control wake options = Off (temp) | ★★☆☆☆ |
| 5 | Voice/motion wake (if supported) | TV wakes without clear HDMI activity | Voice/motion features = Off (temp) | ★★☆☆☆ |
| 6 | Stuck remote button / repeated input | Power/app triggers at random times | Remove batteries / check stuck keys | ★★☆☆☆ |
| 7 | Firmware/standby logic oddities | Problem persists after isolating devices | Update software + power reset | ★☆☆☆☆ |
Turn off auto power features in LG settings
The next most reliable fix for an LG TV turning on by itself is disabling “Auto Power On” and any standby/quick-start behaviors that trigger wake from network or signal changes. In 2026, these settings are still a frequent culprit because they’re designed to improve convenience—until they interact badly with your devices.
LG “Auto Power On” features can wake the TV when power, input, or signal conditions change, which matches common “it comes on after plugging in” reports.
Quick Start and power-saving options can alter how aggressively an LG TV remains ready for network or input changes.
Temporarily turning off network wake/remote control wake features is a clean diagnostic step when HDMI-CEC has already been ruled out.
What to look for (model-dependent wording)
Inside Settings, search for terms like:
– Auto Power On / Auto Power
– Standby / Standby behavior
– Quick Start+ (or similar “fast boot” language)
– Power Saving / Eco Mode adjustments
– Wi‑Fi or Network features that mention waking or remote control
Turn these Off (or temporarily set them to the least “wake-friendly” option). Then power-cycle the TV and external devices so the behavior resets cleanly.
Use change-one-variable testing (so you don’t chase your own settings)
If you change multiple wake-related options at once, you won’t know which one fixed it. Use a simple method:
– Disable one category (CEC first, then auto power, then network/motion).
– Retest for a few hours (or overnight if the event is at night).
– Only then move to the next category.
Manage motion/voice/network triggers
If your LG TV wakes without any obvious HDMI activity, motion/voice features or network wake commands are the next suspects. Disabling them temporarily helps you confirm whether the TV is responding to reminders, misrecognitions, or app/network control.
Voice and motion wake features on smart TVs can trigger unintended power events when they misinterpret ambient audio or gestures.
Some LG smart features and remote app controls can send wake commands over the network, so turning off network wake is a valid confirmatory test.
Scheduled viewing, reminders, or app-based triggers can initiate a wake state even when you didn’t press the remote.
Motion / voice
On supported LG models, look for options that mention:
– Voice recognition
– Motion / gesture (often tied to “touchless” or proximity behavior)
– Ambient wake or “listening” status
Turn them Off temporarily, then observe whether LG TV power-ups stop.
Scheduled viewing and reminders
If you use the LG home dashboard or channel/app scheduling:
– Clear scheduled reminders
– Turn off auto start or “watch later” style prompts (wording varies)
– Check that nothing in connected apps (like live TV guides) is set to “wake and play”
Network/remote control wake
If your LG TV supports remote app control or “wake over network,” disable it temporarily:
– Turn off remote/app wake toggles in TV settings
– Also review any connected accounts on the LG side (especially if more than one household member uses the same TV)
Power reset and software checks
When settings changes don’t resolve the waking behavior, a full power reset plus a firmware update is the next disciplined step. This clears standby state logic and addresses bugs that can cause repeated or incorrect power/wake decisions.
A complete power cycle (unplugging the TV) is often recommended to fully reset standby circuits when standby/wake behavior is inconsistent.
Software updates can change HDMI-CEC/Simplink handling and standby behavior, so it’s important to re-check those settings after updating.
After updating, re-verifying HDMI-CEC and Auto Power settings prevents unexpected re-enables caused by firmware changes.
Do the power-cycle correctly
Use your LG manual’s recommended wait time; the layout note below is intentionally left as a placeholder:
– Turn the TV Off
– Unplug from power for
– Plug back in and test
Update webOS / TV firmware
Go to Settings → Support → Software Update (wording varies). After updating:
1. Re-check HDMI-CEC/Simplink (keep it Off if that fixed it).
2. Re-check Auto Power On (keep Off if that fixed it).
If the TV only wakes under one condition
If the LG TV consistently wakes only when a particular console/streaming box is present, the problem may be a device-side CEC/power option—not a TV-side bug. In that case, review the console/box setting for:
– HDMI-CEC / system control / power sync
– “One touch play” or “power on by HDMI”
What can go wrong (and when not to chase settings)
Disabling HDMI-CEC and auto power features can fix the issue, but it can also reduce convenience or reveal a hardware problem if the TV wakes even with everything unplugged. If you’re getting false confidence from settings changes, stop and shift to a more rigorous diagnosis.
Disabling HDMI-CEC can break convenient one-button audio control between your TV and soundbar/receiver.
If the LG TV powers on when fully isolated from external devices and the remote, hardware-related standby/IR issues become more likely than settings-only causes.
When a specific connected device triggers wake, device-side HDMI-CEC/power sync settings may be the real cause even if TV settings look correct.
Trade-offs to consider (quick pros/cons)
| Approach | Main upside | Main downside |
|---|---|---|
| Disable HDMI-CEC/Simplink | Stops device-driven wake-ups fast | You may lose simplified soundbar/receiver control |
| Disable Auto Power On | Prevents wake after plug-in/network changes | The TV may boot less “smart” for your workflow |
| Disable network wake/remote features | Confirms whether apps/accounts are triggering wake | Remote-app control may not function as smoothly |
| Only do firmware update (no settings changes) | Fixes software bugs | May not stop wake if the trigger is device/feature-related |
When settings troubleshooting won’t fix it
If your LG TV turns on by itself even when:
– No HDMI devices are connected,
– The remote batteries are removed,
– The TV has been unplugged from external power accessories (power strips/switches),
then the cause may be standby circuitry or an IR/receiver fault. Settings-only changes won’t be reliable in that scenario.
Verdict / tip (what I’d do first)
Start with isolation: unplug external devices, switch away from active HDMI inputs, then disable HDMI-CEC/Simplink and Auto Power On. If the LG TV still powers on by itself after those changes, stop tweaking one setting at a time and move to a structured reset: power-cycle per LG guidance + firmware update, then consider service if behavior persists—especially when there’s no external input and no remote activity.
Downside: disabling HDMI-CEC can reduce one-touch audio convenience, and turning off network wake can affect remote app behavior. If you rely on CEC-driven sound control for daily use, change CEC first but re-enable selectively only the pieces you truly need.
Scan/checklist: fastest path to the fix
Use this checklist exactly as a sequence—each step reduces the search space for your LG TV turning on by itself:
– [ ] Remove power/plug out external devices (console, streaming box, soundbar)
– [ ] Test with no HDMI input selected
– [ ] Disable HDMI-CEC / Simplink / HDMI Device Control
– [ ] Turn off Auto Power / Auto Power On (if present)
– [ ] Disable motion/voice/network wake features temporarily
– [ ] Power-cycle (unplug) and update TV software
– [ ] If it persists: consider hardware/service diagnosis
Conclusion
In most cases, an LG TV that turns on by itself is being woken by a feature designed for convenience—most often HDMI-CEC/Simplink, Auto Power On, or network/motion/voice triggers. Isolate the problem by unplugging external devices, disable HDMI-CEC and auto power options, then confirm with a power-cycle and software update. If the behavior continues even in a fully isolated setup, it’s time to stop menu-chasing and move toward hardware/service diagnosis.
Sources
– LG TV user manuals / support documentation for your exact webOS model (for the correct names of settings like HDMI-CEC/Simplink and Auto Power).
– LG support documentation explaining HDMI-CEC / Simplink behavior on LG TVs.
– LG software update and troubleshooting documentation for webOS TVs.
– HDMI Licensing / HDMI-CEC and HDMI connector documentation used to reference CEC signaling behavior and HDMI pin associations.
Frequently Asked Questions
Why does my LG TV turn on by itself?
An LG TV can power on by itself due to features like Quick Start/Auto Power, HDMI-CEC (Simplink) commands from connected devices, or a wake signal from the remote/app. It can also be caused by a failing remote button, power settings that enable Auto Power On, or periodic background activity. If the TV starts repeatedly at similar times, check for scheduled recordings, timers, or wake-on-network options in Settings.
How can I stop an LG TV from turning on automatically using settings?
Start by opening your LG TV Settings and disabling Auto Power/Quick Start (wording varies by model) and turning off any Wake on LAN or similar network wake options. Then check Connection/Devices settings for HDMI-CEC (Simplink) and disable it to prevent external devices from triggering power. Finally, review Time/Timers to ensure no scheduled power-on events are enabled.
What should I check if the TV turns on by itself when I use a soundbar or game console?
HDMI-CEC can send “power on” commands from a connected soundbar, set-top box, or game console to your LG TV, causing unexpected wake-ups. Turn off Simplink/HDMI-CEC on the TV and, if needed, disable CEC/Bravia Sync/Anynet+ on the connected device as well. After changing settings, restart both the LG TV and the external device to confirm the fix.
Which remote or device settings could cause my LG TV to power on unexpectedly?
A stuck or malfunctioning remote button (especially Power or TV channel buttons) is a common reason for an LG TV to turn on by itself. Try removing batteries, testing with a different remote, and disconnecting any remotes paired through Bluetooth. Also check whether any LG TV app (like webOS remote) or smart home integration is sending wake commands.
What is the best troubleshooting step for an LG TV that turns on by itself after power outages?
After a power interruption, some LG TV models may restore power behavior using a setting like “Power On” or Quick Start. Go to Settings and disable features that automatically power the TV on after standby or power restoration, and confirm sleep/wake settings are configured correctly. If the issue persists, update the TV firmware and perform a full power cycle (unplug for 60 seconds) to clear residual triggers.
📅 Last Updated: October 19, 2026 | Topic: LG TV turns on by itself: how to fix | Content verified for accuracy and freshness.
References
- Consumer Electronics Control
- Standby power
- Time switch
- Remote control
- https://www.energy.gov/energysaver/standby-power
- LG search | LG USA
- https://scholar.google.com/scholar?q=LG+TV+turns+on+by+itself+fix Google Scholar
- https://scholar.google.com/scholar?q=unintended+TV+power+on+HDMI-CEC+troubleshooting Google Scholar
- https://scholar.google.com/scholar?q=television+standby+wake+remote+control+causes Google Scholar
