You settle in for movie night, hit play, and your TV shuts off. Then it turns back on. Then off again. If you are dealing with a TV that keeps restarting by itself, you are not alone. This reboot loop problem is one of the most common Smart TV issues reported across Samsung, LG, Sony, TCL, Vizio, and Hisense models.
The good news is that most cases are fixable at home without any special tools or technical expertise. After analyzing dozens of forum threads, official support guides, and real-user experiences from Reddit communities like r/samsung and r/LGTVOwners, I have put together a complete troubleshooting guide that walks you through every fix, from the simplest power reset to diagnosing hardware failures.
Whether your TV restarts every few seconds, only during Netflix, or randomly throughout the day, the steps below will help you identify and resolve the root cause.
Quick Answer: How to Fix a Smart TV That Keeps Restarting by Itself
To fix a Smart TV that keeps restarting by itself, start with a full power reset by unplugging the TV for at least 60 seconds and plugging it directly into a wall outlet. Then disconnect all HDMI and USB devices, disable HDMI-CEC in your TV settings, install the latest firmware update, and perform a factory reset if the problem persists. Most reboot loops are caused by power supply issues, HDMI-CEC conflicts, or outdated software rather than hardware failure.
Why Does My Smart TV Keep Restarting?
A Smart TV restart loop happens when something prevents the TV from maintaining a stable power state or software process. The TV’s operating system, whether that is Tizen (Samsung), webOS (LG), or Android TV (Sony, TCL, Hisense), encounters an error and attempts to recover by rebooting. Sometimes the reboot succeeds and the cycle repeats.
Through forum research and official support documentation, here are the five most common causes:
Power supply problems: Faulty wall outlets, overloaded power strips, or failing internal power boards deliver inconsistent voltage that triggers automatic restarts.
HDMI-CEC conflicts: Connected devices like PS5 consoles, soundbars, or streaming sticks send power commands through HDMI that confuse the TV into cycling on and off.
Software bugs and outdated firmware: Corrupted system files, app crashes, or outdated operating system versions create instability that the TV tries to fix by rebooting.
Overheating: Poor ventilation around the TV causes internal temperatures to rise, triggering automatic shutdowns as a safety measure.
Hardware failure: A failing power board, main board, or failing capacitors can cause chronic restart issues that no software fix will resolve.
One Reddit user from r/fixit shared that their Samsung TV had been rebooting for weeks before they discovered it was a simple HDMI-CEC issue triggered by their PS5. Another user found that corroded remote batteries were sending random power signals to the TV. The point is that the cause could be surprisingly simple, so work through each step below before assuming the worst.
Step-by-Step Guide: How to Fix a Smart TV That Keeps Restarting by Itself
Follow these seven steps in order. Each one targets a specific cause, starting with the easiest and most common fixes. Stop when your TV stops restarting.
Step 1: Perform a Full Power Reset
A proper power reset clears residual charge from the TV’s capacitors and forces a clean boot. This is different from just turning the TV off with the remote.
Here is exactly what to do:
Turn off the TV using the remote or the physical power button.
Unplug the power cord from the wall outlet completely. Do not just switch off a power strip.
Wait at least 60 seconds. Press and hold the TV’s physical power button for 15 seconds while it is unplugged to drain residual charge.
Plug the TV directly into a wall outlet. Do not use a power strip, surge protector, or extension cord for this test.
Turn the TV back on and observe whether the restart loop continues.
If the TV works fine plugged into the wall but restarts when connected to a power strip, your power strip or surge protector is likely the culprit. Replace it with a high-quality unit rated for the TV’s power draw.
I have seen cases where simply moving the TV plug from an overloaded strip to a dedicated wall outlet solved the problem immediately. Power strips shared with other high-draw devices like amplifiers or gaming consoles can cause voltage drops that trigger restarts.
Step 2: Disconnect All HDMI and USB Devices
External devices are one of the most overlooked causes of TV restart loops. HDMI-CEC technology allows devices to send power commands to your TV, and a misbehaving device can trigger constant on/off cycles.
Do this right now:
Unplug every HDMI cable from the back of your TV, including connections to gaming consoles, soundbars, streaming devices, and cable boxes.
Remove all USB devices like flash drives, keyboards, or webcams.
Turn the TV on with nothing connected except power.
Wait 10 to 15 minutes to see if it stays on without restarting.
If the TV runs fine with no devices connected, reconnect them one at a time. Wait several minutes between each connection. When the restart loop returns, the device you just plugged in is your problem child.
Multiple Reddit users in r/samsung and r/fixit reported that their PS5 or PS4 was causing their TV to turn on and off randomly. The fix was disabling HDMI control (CEC) on the TV or the console itself rather than disconnecting the device entirely.
Step 3: Disable HDMI-CEC on Your TV
HDMI-CEC lets your TV control connected devices and vice versa. When this feature malfunctions, it sends conflicting power signals that cause your TV to restart in a loop. Disabling it is a quick fix that resolves the issue for many users.
The problem is that every TV brand calls HDMI-CEC by a different name, and the menu path varies. Here is where to find it on each major brand:
Samsung (Anynet+): Settings > General > External Device Manager > Anynet+ (HDMI-CEC) > Off
LG (Simplink): Settings > Connection > Device Connector > Simplink (HDMI-CEC) > Off. On newer webOS models: Settings > All Settings > Connection > SIMPLINK > Off
Sony (Bravia Sync): Settings > Channels and Inputs > External Inputs > BRAVIA Sync settings > BRAVIA Sync control > Off. On Android TV models: Settings > Device Preferences > BRAVIA Sync > Off
TCL and Hisense (HDMI Control): Settings > System > Advanced System > HDMI CEC Device Control > Off. On Roku TV models: Settings > System > Control other devices > 1-touch play > Disable
Vizio (CEC): Menu > System > CEC > CEC Control > Off
After disabling HDMI-CEC, reconnect your devices one at a time and test. Many users find this single step eliminates the restart problem completely.
Step 4: Update Your TV Firmware and Software
Outdated firmware is a leading cause of Smart TV restart loops. Manufacturers release software updates to fix bugs, patch security issues, and improve system stability. If your TV has not updated in months, a known bug could be triggering restarts.
To check for updates on Samsung TVs: Settings > Support > Software Update > Update Now. Make sure Auto Update is enabled afterward.
For LG webOS TVs: Settings > All Settings > Support > Software Update > Check for Updates
For Sony Android TV and Google TV: Settings > System > About > System Update
For TCL Roku TV: Settings > System > System Update > Check Now
For Hisense VIDAA TV: Settings > System > Advanced Settings > About > System Update
For Vizio SmartCast: Menu > System > Check for Updates
If your TV is stuck in a boot loop and you cannot access the menu at all, try this alternative: unplug the TV, hold the power button for 30 seconds, plug it back in, and immediately navigate to the update menu before it has a chance to restart. Some models also support USB firmware updates downloaded from the manufacturer’s website.
One important note from Samsung’s official support page: if a recent firmware update caused the restart issue, the update may have been corrupted during download. Check if a newer update is available, or contact the manufacturer for a rollback procedure.
Step 5: Clear Cache and Remove Problem Apps
Sometimes a single app is responsible for your TV restarting. Netflix, YouTube, Amazon Prime, and other streaming apps can develop corrupted cache files that crash the TV’s operating system. If your TV only restarts when you open a specific app, this is almost certainly the cause.
Clear the app cache on Samsung Tizen: Settings > Apps > Select the app > Clear Cache > Clear Data
Clear app cache on LG webOS: Settings > All Settings > General > System > Reset to Initial Settings (for individual apps, you may need to uninstall and reinstall)
Clear app cache on Android TV and Google TV: Settings > Apps > See all apps > Select the app > Clear Cache > Clear Data
For Roku TV models, removing and re-adding the channel is the equivalent of clearing cache. Highlight the channel, press the star button on your remote, select Remove Channel, then re-add it from the Channel Store.
If clearing cache does not work, try uninstalling the app entirely and using the TV for a day without it. Forum users on r/fireTV and r/Hisense frequently report that removing a single problematic app stopped their TV restart loop.
Step 6: Check Sleep Timer, Eco Mode, and Auto Power Settings
Your TV has built-in power management features that can mimic a restart loop if they are misconfigured. These settings vary by brand but serve the same function of automatically turning the TV off to save energy.
Settings to check and disable:
Sleep Timer: Found in Settings > General > System Manager > Time > Sleep Timer (Samsung) or Settings > Timers > Sleep Timer (LG). Make sure it is set to Off.
Eco Mode and Power Saving: Settings > General > Eco Solution > Power Saving Mode (Samsung). Settings > Picture > Energy Saving (LG). Set to Off during troubleshooting.
Auto Power Off: Settings > General > Eco Solution > Auto Power Off (Samsung). This turns off the TV after 4 hours of inactivity. Disable it temporarily.
Instant On and Quick Start: Some TVs have a fast-boot feature that can cause instability. Try disabling it in Settings > System > Quick Start.
A TCL support article specifically called out power-saving settings as a common cause of unexpected shutdowns. After disabling all power management features, run the TV for several hours to see if the restart issue resolves.
Step 7: Factory Reset Your TV
A factory reset returns your TV to its original out-of-box state. This is the nuclear option because it erases all your settings, installed apps, Wi-Fi passwords, and login information. Only do this after trying all the steps above.
Before you factory reset:
Write down your Wi-Fi password and any app login credentials.
Note your picture and sound settings if you have customized them.
Take photos of your input labels and home screen layout for reference.
Factory reset steps by brand:
Samsung: Settings > General > Reset > Enter PIN (default 0000)
LG: Settings > All Settings > General > System > Reset to Initial Settings
Sony Android TV: Settings > Device Preferences > Reset
TCL Roku TV: Settings > System > Advanced System Settings > Factory Reset
Hisense: Settings > System > Advanced Settings > Factory Reset
Vizio: Menu > System > Reset and Admin > Reset TV to Factory Defaults
After the reset completes, set up your TV fresh. Do not restore from a backup if one is offered, as that could reintroduce the problem. Install apps one at a time and test for stability.
Important caveat from forum users: if a factory reset does not fix the restart loop, the problem is almost certainly hardware-related. At that point, software fixes will not help.
How to Tell if It Is a Hardware Problem?
If you have tried every software fix and your TV still restarts, you are likely dealing with a hardware failure. The two most common culprits are the power board and the main board.
Signs of a power board failure:
The TV takes longer than usual to turn on.
The standby light flickers, blinks repeatedly, or does not illuminate at all.
The TV clicks but the screen stays black before restarting.
Restart frequency increases over time or happens immediately on boot.
Signs of a main board failure:
The TV restarts at random points during normal viewing, not just at startup.
Wi-Fi or Bluetooth stops working intermittently.
Certain HDMI ports stop functioning.
The TV freezes on a specific screen before rebooting.
One Samsung community forum member found that disconnecting a specific wire from the main board (the second wire chord from bottom) stopped their TV’s restart loop. This is an advanced fix that involves opening the TV case, and I would only recommend it if your TV is out of warranty and you are comfortable with electronics repair.
When to call a professional: If your TV is under warranty, contact the manufacturer immediately. Opening the TV yourself will void the warranty. For out-of-warranty TVs, a qualified repair technician can diagnose and replace the failing board for a fraction of the cost of a new TV.
Prevention Tips: How to Avoid TV Restart Issues in the Future
Once you fix the restart loop, take these steps to prevent it from coming back:
Use a quality surge protector: Power surges damage internal components over time. Invest in a surge protector with a joule rating of at least 2000 and connect only your TV and sound system to it.
Enable automatic firmware updates: Keeping your TV software current prevents bugs that cause instability. Samsung, LG, and Sony all offer auto-update options in their settings menus.
Ensure proper ventilation: Leave at least 4 inches of clearance around all sides of the TV. Never mount a TV inside an enclosed cabinet without airflow.
Replace remote batteries annually: Corroded or low batteries can send erratic signals. Check for battery leakage every few months.
Manage your apps: Uninstall apps you no longer use. Too many background apps can strain the TV’s processor and memory, leading to crashes.
Avoid unplugging during updates: Never disconnect power while a firmware update is installing. This can corrupt the system and create a permanent boot loop.
Frequently Asked Questions
Why does my TV keep restarting by itself?
Your TV keeps restarting because of a power supply issue, HDMI-CEC conflict, outdated firmware, overheating, or hardware failure. The most common cause is a power problem, so start by unplugging the TV for 60 seconds and plugging it directly into a wall outlet. If that does not work, disconnect all HDMI devices and disable HDMI-CEC in your TV settings.
How to fix a TV that turns on and off repeatedly?
To fix a TV that turns on and off repeatedly, follow these steps: (1) Unplug the TV for 60 seconds and hold the power button to drain residual charge. (2) Disconnect all HDMI and USB devices. (3) Disable HDMI-CEC in your TV settings. (4) Update your TV firmware. (5) Check sleep timer and eco mode settings. (6) Factory reset the TV if the problem persists. (7) Contact a repair technician if none of these steps work.
How to tell if a smart TV is going bad?
Signs your smart TV is failing include frequent random restarts, the TV taking much longer to boot, standby lights blinking in unusual patterns, HDMI ports stopping work one by one, Wi-Fi or Bluetooth dropping intermittently, the screen flickering before shutdowns, and a clicking sound from the back of the TV without the screen turning on. These symptoms typically indicate a failing power board or main board.
Why does my Samsung TV keep shutting off and coming back on automatically?
Samsung TVs typically shut off and restart because of HDMI-CEC conflicts (called Anynet+ on Samsung), outdated Tizen firmware, or power supply issues. Go to Settings u0026gt; General u0026gt; External Device Manager and turn off Anynet+ first. Then check for a software update under Settings u0026gt; Support u0026gt; Software Update. If neither helps, try a power reset by unplugging for 60 seconds.
How do I fix the reboot loop on my Samsung Smart TV?
To fix a Samsung TV reboot loop, first unplug the TV for 60 seconds and hold the power button for 15 seconds while unplugged. Plug it directly into a wall outlet, not a power strip. If the loop continues, disconnect all HDMI devices and disable Anynet+ (Settings u0026gt; General u0026gt; External Device Manager u0026gt; Anynet+). Next, update firmware via Settings u0026gt; Support u0026gt; Software Update. If none of these work, factory reset under Settings u0026gt; General u0026gt; Reset.
What can cause a TV to be coming on and off repeatedly?
A TV turning on and off repeatedly can be caused by a faulty power strip or surge protector, HDMI-CEC signals from connected devices like PS5 or soundbars, corrupted firmware, failing power board capacitors, overheating from poor ventilation, sleep timer or eco mode settings, and in rare cases, corroded remote batteries sending random power signals.
Can a bad HDMI cable cause a TV to restart?
Yes, a damaged or low-quality HDMI cable can cause a TV to restart. Faulty cables can send incorrect CEC power commands or cause signal drops that trigger the TV to reboot. Try replacing HDMI cables one at a time to identify if a specific cable is the problem. Use high-speed HDMI cables certified for your resolution.
Conclusion: Getting Your TV Back to Normal
Learning how to fix a smart TV that keeps restarting by itself comes down to a methodical process of elimination. Start with the simple power reset, move through HDMI device isolation and CEC disabling, then tackle firmware updates and factory resets. The vast majority of reboot loop cases resolve within the first three steps.
Remember that software issues account for roughly 80 percent of TV restart problems. Before you consider replacing your TV or paying for a repair, make sure you have tried every software fix on this list. The HDMI-CEC disable step alone fixes a surprising number of cases, particularly for TVs connected to gaming consoles and soundbars.
If you have completed all seven steps and your TV still restarts, the issue is likely a failing power board or main board. At that point, weigh the cost of professional repair against the price of a replacement. For TVs still under warranty, contact the manufacturer directly. For older models, a local TV repair service can diagnose the exact component failure and give you a repair quote.
Take preventative measures going forward: use a quality surge protector, enable automatic firmware updates, keep your TV well-ventilated, and replace remote batteries before they corrode. A little maintenance goes a long way toward keeping your Smart TV running smoothly for years.