How to Fix a Samsung TV That Keeps Power Cycling (real fixes technicians actually use)

If your Samsung TV keeps turning on and off by itself, you’re not alone, and you’re probably frustrated that every article you find tells you to “unplug it for 60 seconds.” That advice might work for a temporary glitch, but if your TV is stuck in a power cycling loop, you need real solutions.

This guide covers every known fix, from the quick settings changes that solve most cases to the hardware repairs that technicians actually perform. The methods are ordered from easiest to most advanced, so start at the top and work your way down.

Before You Try Anything: Check Samsung’s Hidden Event Log

Most people don’t know this exists. Samsung TVs made in 2019 or later have a built-in diagnostic log that tells you exactly why the TV turned on or off each time.

1. Go to Settings > Support > About TV > Event Logs.
2. Look at the entries. Each one shows a reason for the power event.

Here’s what the entries mean:

• “CEC Command” — A device connected via HDMI woke your TV up. Skip to the Anynet+ section below.
• “SmartThings” or “YouTube” — An app on your network triggered it. Skip to the SmartThings section.
• “WOL” — Wake-on-LAN. Something on your Wi-Fi sent a wake signal.
• “BLE” — Bluetooth wake. Your phone or a paired device triggered it.
• “Sensor” — The ambient light or motion sensor activated it. Skip to the Eco Sensor section.

If the Event Log points to a specific cause, jump directly to that section. If your TV is too old for Event Logs or cycles too fast to access settings, start with Method 1 and work through in order.

Method 1: Do a Proper Power Drain (Not Just “Unplug for 60 Seconds”)

The standard advice to unplug for a minute is incomplete. A proper power drain clears the TV’s volatile memory and resets its internal power regulation.

1. Turn off the TV with the remote.
2. Unplug the TV from the wall outlet. Not from a power strip — from the wall.
3. Wait 5 full minutes, not 60 seconds. The internal capacitors need time to fully discharge.
4. While the TV is unplugged, press and hold the power button on the TV itself (not the remote) for 30 seconds. This drains residual power from the mainboard.
5. Plug the TV back in directly to a wall outlet. Do not use a power strip or surge protector for this test.
6. Turn on the TV.

If the cycling stops, the issue was likely a software glitch or a problem with your power strip. If it continues, move to the next method.

Method 2: Disable Anynet+ (HDMI-CEC)

This is the single most common fix for Samsung TVs that turn on and off by themselves. HDMI-CEC, which Samsung calls “Anynet+,” lets devices connected via HDMI send power commands to your TV. The problem is that Samsung’s CEC implementation is buggy, and connected devices frequently send garbled signals that create an on-off loop.

Even if you have no devices connected right now, your TV may still be responding to a cached device list from a previously connected device.

On 2022–2026 models:

1. Go to Settings > Connection > External Device Manager.
2. Find Anynet+ (HDMI-CEC).
3. Turn it Off.

On 2020–2021 models:

1. Go to Settings > General > External Device Manager.
2. Turn off Anynet+ (HDMI-CEC).

On pre-2020 models:

1. Go to Settings > System > Expert Settings.
2. Turn off Anynet+ (HDMI-CEC).

After disabling it, restart the TV and monitor for 24 hours. Many users across iFixit, AVSForum, and Samsung Community forums report this permanently fixes the issue.

If You Need CEC for Your Soundbar

Turning off Anynet+ completely will disable ARC/eARC audio to your soundbar. If that’s a problem, the better approach is disabling CEC on the specific device causing the conflict rather than on the TV itself.

• PS5: Go to Settings > System > HDMI > disable “Enable HDMI Device Link.”
• Xbox: Go to Settings > General > TV & display options > HDMI-CEC > Off.
• Fire TV Stick / Cube: Go to Settings > Display & Sound > HDMI Device Central > Off.
• Chromecast: CEC is enabled by default with no built-in toggle. The only option is a hardware CEC blocker adapter (about $10–16 on Amazon, such as the BlueRigger HDMI CEC-Less Adapter), which physically blocks the CEC signal on that one HDMI cable while leaving everything else intact.

Devices Most Likely to Cause CEC Power Cycling

Based on forum reports, these are the most common culprits:

• Soundbars (especially Sonos Arc, Bose Soundbar 500, and ironically Samsung’s own soundbars)
• Amazon Fire TV Stick and Fire Cube (frequently auto-wakes Samsung TVs and switches input)
• PS5 (a firmware update enabled HDMI Device Link by default, catching many users off guard)
• Chromecast (documented cases of it silently toggling the TV’s CEC settings every 24–48 hours)
• AV receivers (Denon models paired with Samsung QLED and OLED TVs are heavily reported)

The Nuclear Option: CEC Reset

If disabling Anynet+ doesn’t work, your TV may be responding to a cached device list. To clear it:

1. Unplug all HDMI cables from the TV.
2. Turn on the TV with no HDMI devices connected.
3. Go to Settings and open the Anynet+/CEC menu.
4. Let the TV scan for devices. It will find nothing, which clears the cached list.
5. Reconnect your HDMI devices one at a time, testing for cycling after each one.

Method 3: Disable Power On with Mobile and SmartThings Wake Features

Your Samsung TV can be turned on by any device on your Wi-Fi network that’s linked through SmartThings. The YouTube app on a phone sharing the same network can trigger your TV to wake up, even if you’re not casting to it. Bluetooth-paired phones can also wake it.

On 2024–2026 models:

1. Go to Settings > All Settings > Connection > Network > Expert Settings.
2. Turn off Power On with Mobile.

On older models:

1. Go to Settings > General > Network > Expert Settings.
2. Turn off Power On with Mobile.

If you’re still having issues, try removing the TV from SmartThings entirely:

1. Open the SmartThings app on your phone.
2. Find your TV and remove it from your device list.
3. Monitor for 24–48 hours.
4. If the cycling stops, you can re-add the TV to SmartThings later — sometimes re-registering fresh resolves the conflict.

Method 4: Turn Off Auto Power Off and All Energy-Saving Features

Samsung TVs ship with an automatic shutoff timer set to 4 hours by default. If your remote batteries are weak and not sending regular signals, the TV thinks nobody is watching and shuts itself off. Firmware updates can also silently re-enable these settings even if you turned them off before.

On 2024–2026 models:

1. Go to Settings > All Settings > General & Privacy > Power and Energy Saving.

On 2022–2023 models:

1. Go to Settings > General > Power and Energy Saving.

On 2020–2021 models:

1. Go to Settings > General > Eco Solution.

Once you’re in the power settings, disable all of the following:

• Auto Power Off — Turn it completely off, or set it to the maximum (8 hours).
• Power Saving Mode — Off.
• Brightness Optimization — Off.
• Motion Lighting — Off.
• Eco Sensor / Ambient Light Detection — Off.

Also check for sneaky timers:

1. Go to Settings > General > System Manager > Time.
2. Make sure Sleep Timer is set to Off.
3. Make sure Off Timer is set to Off. There are documented cases of firmware updates silently setting the Off Timer to a specific time (like 11 PM) without the user’s knowledge.

Frame TV Owners: Extra Sensor Steps

Samsung Frame TVs have motion and ambient light sensors on the bottom bezel that can misinterpret things like car headlights through a window or outdoor security lights as commands to wake up or turn off.

1. Go to Home > Art Page > Sleep Options.
2. Set Night Mode to Off.
3. Reduce Motion Sensor Sensitivity to Low, or turn it off entirely.

Method 5: Check for IR Sensor Interference

Your TV’s infrared receiver can pick up signals from sources other than your remote, including dying fluorescent lights, CFL bulbs, LED strip lights with IR controllers, and other Samsung remotes in the same room.

Samsung uses identical IR codes across many of its products, so a TV remote can accidentally control a Samsung monitor, soundbar, or second TV in the same room, and vice versa.

How to test if IR interference is the cause:

1. Remove the batteries from all remotes in the room.
2. Cover the TV’s IR sensor (usually on the bottom center bezel) with a piece of opaque tape.
3. Leave the TV on for 24 hours.
4. If the power cycling stops during this period, IR interference is your problem.

How to fix it:

• Replace any dying fluorescent or CFL bulbs in the room.
• If you have LED strip lights with IR remotes, switch to strips that use RF controllers instead.
• If you have multiple Samsung devices in the same room, place two small pieces of black electrical tape over the TV’s IR sensor with a narrow gap between them. This limits the reception angle so the remote must be pointed directly at the TV to register.

Method 6: Update the Firmware (or Stop It from Updating)

Samsung firmware updates have a documented history of introducing power cycling bugs. The January 2026 security patch specifically addressed power management issues across multiple TV lines, confirming Samsung was aware of the problem.

To update manually:

1. Go to Settings > Support > Software Update > Update Now.
2. Let the update install and restart.

If a firmware update caused the problem:

Samsung does not support firmware rollback. You cannot go back to a previous version. But you can try this:

1. Go to Settings > Network > Wi-Fi and disconnect from your network (select “Forget Network”).
2. Unplug any Ethernet cable.
3. If disconnecting from Wi-Fi stops the restarts, the issue is likely an interrupted auto-update.
4. Go to samsung.com, find your exact TV model number, and download the correct firmware file.
5. Copy it to a USB drive and update manually through Settings > Support > Software Update > Update via USB.

To prevent auto-updates from causing future issues:

1. Go to Settings > Support > Software Update.
2. Turn off Auto Update.

Method 7: Disconnect External Devices One at a Time

If the Event Log isn’t available on your model and you’re not sure what’s causing the cycling, isolate the problem through elimination.

1. Turn off the TV and unplug it.
2. Disconnect every HDMI cable, USB device, antenna cable, and audio cable.
3. Plug the TV back in with nothing connected.
4. Turn it on and monitor for several hours.

If the cycling stops with nothing connected, add devices back one at a time, waiting at least a few hours between each one. When the cycling returns, you’ve found your culprit.

Pay special attention to:

• USB devices — Some USB drives or accessories can cause boot loops if the TV tries to read corrupted data on startup.
• HDMI splitters and switches — These frequently cause CEC conflicts even with Anynet+ disabled.
• Older soundbars — Soundbars with outdated firmware are notorious for sending bad CEC signals.

Method 8: Plug Directly into a Wall Outlet

Samsung’s own support recommends bypassing surge protectors, and while their reasoning is questionable (they claim surge protectors “interfere with circuitry,” which electrical engineers dispute), the diagnostic step is still valid.

The real issue is usually one of these:

• Degraded surge protectors. Surge protectors lose effectiveness with each surge they absorb and should be replaced every 3–5 years. An old one can deliver inconsistent voltage.
• Overloaded circuits. If your TV shares a circuit with a refrigerator, air conditioner, or other high-draw appliance, voltage fluctuations when those appliances cycle on and off can trigger Samsung’s protection circuits.
• Modified sine wave UPS units. If your TV is plugged into a UPS (uninterruptible power supply), make sure it outputs a pure sine wave. Modified sine wave UPS units are documented to cause Samsung TVs to power cycle when switching to battery power.

To test:

1. Plug the TV directly into a wall outlet in a different room (preferably on a different circuit breaker).
2. Don’t use any power strip, surge protector, or extension cord.
3. Monitor for 24 hours.

If the cycling stops, the problem is your power source, not the TV.

Method 9: Factory Reset

Only try this after the methods above have failed. A factory reset erases all your apps, accounts, and settings, so you’ll need to set everything up again.

1. Go to Settings > Support > Self Diagnosis > Reset (or on newer models, Settings > All Settings > General & Privacy > Reset).
2. Enter your PIN. The default is 0000.
3. Confirm the reset and wait for the TV to restart.
4. During initial setup, do not connect to Wi-Fi yet. Complete the basic setup offline first and test whether the cycling returns.
5. If the TV is stable offline, connect to Wi-Fi but do not sign into SmartThings or Samsung Account right away. Test for another 24 hours.
6. Gradually re-add accounts and apps, monitoring for cycling after each step.

This approach helps you identify whether a specific app, account, or network feature is triggering the problem.

Method 10: Inspect the Power Supply Board for Bad Capacitors

If none of the software fixes work and your TV cycles rapidly every 2–10 seconds, often with an audible clicking sound from inside the TV, you likely have a hardware problem. The most common hardware cause is failed electrolytic capacitors on the power supply board.

What to look for:

You can visually inspect the power board without any tools beyond a screwdriver.

1. Unplug the TV and wait 10 minutes for internal capacitors to discharge.
2. Remove the screws from the back panel (usually 10–20 Phillips screws around the edges).
3. Carefully lift off the back cover.
4. Locate the power supply board — it’s the board where the power cord connects.
5. Look at the cylindrical capacitors on the board. Signs of failure include:
   • Bulging or domed tops (healthy caps have flat tops with a visible X or K scoring pattern)
   • Brown or dark residue leaking from the base
   • Physical tilting or leaning
   • A small raised dot in the center of the scoring pattern

Important: Capacitors can fail without any visible signs. If you have access to an ESR (equivalent series resistance) meter, testing capacitors in-circuit is more reliable than visual inspection alone.

The capacitors that fail most often on Samsung TVs are:

• 2200µF 10V (the number-one failure point, usually found near the 5V and 12V supply rails)
• 1000µF 25V
• 1000µF 10V

All should be rated 105°C.

How to fix it:

• If you can solder: Complete capacitor repair kits are available on Amazon for $8–15. Witonics.com sells premium kits with Nichicon/Rubycon/Panasonic capacitors for under $20. When replacing, you can use a higher voltage rating than the original (a 25V cap replacing a 10V cap will actually last longer), but keep the capacitance (µF) value exactly the same.
• If you can’t solder: Replace the entire power supply board. This is a screwdriver-only job that takes about 30 minutes. Samsung power boards are labeled with a BN44-xxxxx part number printed on a sticker on the board. Search that part number on eBay, Amazon, or ShopJimmy.com. Replacement boards cost $30–80 for most models.

Before you order a new board, do this test:

Disconnect the ribbon cable between the power supply board and the mainboard, then plug in the TV. If the LED backlights turn on and stay on, the power board is probably fine and the mainboard is the problem. If the backlights don’t come on at all, the power board is faulty.

Method 11: Check for Panel-Level Failures (Ribbon Cable Test)

On newer Samsung TVs (TU, AU, CU, and QLED series), the most frustrating cause of power cycling is a short in the LCD driver boards, which are part of the panel assembly. The Samsung TU8000 and Frame TV are the most commonly affected models.

The symptom is persistent power cycling that survives a complete power board and mainboard replacement. If you’ve replaced both boards and the TV still cycles, the panel is likely the culprit.

To diagnose:

1. Open the back panel.
2. Locate the ribbon cables connecting the mainboard to the LCD panel (usually 2–4 flat flex cables).
3. Disconnect them one at a time, powering the TV on after each disconnection.
4. If the TV boots and stays on without a specific ribbon cable, that side’s LCD driver has failed.

Workaround (not a permanent fix): Some repair technicians use the “tape-off” method, placing Kapton tape over specific pins on the ribbon cable to block error signals from the shorted panel section. This can restore a working picture with minor visual defects (vertical lines or a slightly darker area on one side). Repair forums report roughly 75% success with this method.

For Frame TVs specifically, Samsung technicians typically need to replace the panel board itself ($150–385 depending on region), as the issue traces to a shorted diode on that board.

Method 12: Access the Samsung Service Menu (Advanced)

Samsung TVs have a hidden service menu that technicians use for diagnostics. This is not the regular settings menu. Changing values here without understanding them can permanently damage your TV, so proceed with extreme caution and write down any original values before modifying anything.

To access the service menu on US/North American models:

1. Turn off the TV so the standby light is on (red light visible).
2. On a standard Samsung IR remote (smart remotes without number keys usually don’t work), press: Mute > 1 > 8 > 2 > Power.

On European models:

1. Press: Info > Menu > Mute > Power.

What to look for:

• Watchdog Error Count (under SVC section) — Shows how many times the TV’s watchdog circuit has detected errors and forced reboots. A high number indicates persistent instability.
• Shop/Exhibition Mode — If accidentally enabled, the TV will cycle through demo content and power states. Disable it.
• Hotel/Hospitality Mode — Common on second-hand or refurbished TVs. This restricts functionality and can cause unexpected power behavior. Disable it.

Do not change any values you don’t understand. The service menu can brick your TV.

When to Give Up and Call Samsung

Contact Samsung Support if:

• Your TV is under warranty (standard Samsung TV warranty is 1 year, but some retailers offer extended coverage)
• You’ve tried every software method and the TV still cycles
• The power board diagnostic test (Method 10) suggests a mainboard failure, and replacement mainboards for your model cost more than a new TV
• The ribbon cable test (Method 11) points to a panel-level failure, where repair costs often approach 50–75% of a new TV’s price

You can reach Samsung Support at 1-800-726-7864 (US) or through samsung.com/support. When you call, mention the specific methods you’ve already tried, as this usually gets you escalated past first-tier support faster.

Samsung Models Most Prone to Power Cycling

Based on the volume of repair forum posts, warranty claims, and technician reports, these Samsung TV models have the most documented power cycling issues:

• Samsung TU8000 (2020) — Panel-level shorts that survive board replacements
• Samsung Frame TV (all generations, especially 2020–2022) — Boot loop caused by LCD panel board diode shorts
• Samsung KS8000 (2016) — So widely reported that dedicated forum threads exist just for this model
• Samsung Q6/Q60/Q70 QLED — Ribbon cable and LCD driver failures
• Samsung AU8000/AU9000 (2021) — Smart Hub-related cycling with firmware corruption

If you own one of these models and experience power cycling, hardware failure is more likely than a simple software glitch, so don’t spend too much time on the basic troubleshooting steps before moving to the hardware diagnostics.