If your TV is turning on and off on its own, you may have a strong desire to understand why this is happening. I had the same issue with Sony TV and my older Vizio TV. There are many solutions that may help you diagnose the issue and fix it.
If your Samsung TV turns on by itself, first try reconnecting the power cable to the back of the TV and power-cycling your television. If the problem persists, then you should update the OS, and disable the sleep timer, Anynet+, Eco mode, and SmartThings. Last, you may need to replace some faulty capacitors or parts on the logic board.
Let us take a look at some of the ways that owners of the Samsung Smart TV have fixed the issue of a Samsung television turning on by itself.
Troubleshoot Samsung TV Turns On By Itself
1. Reconnect/Tighten Power Cable
If your Samsung TV is turning on by itself, it may be a sign that you may have to reconnect and tighten the power cable. This is a common solution to this problem, especially if you have an older Samsung television model.
The first thing you should do is double-check to see if the power cable is plugged in securely to the back of the television set. If your Samsung TV has been placed inside of a protective cabinet, then you will need to remove the back cover of your TV to access the power cable.
You can remove the back cover on your Samsung TV with a screwdriver. Once the cover is removed, go ahead and slowly unplug the power cable from the back of the TV with pliers. Wait at least 10 or 15 seconds and then go ahead and plug the cable back into the designated slot.
2. Disable Anynet+
Anynet+ is a super convenient feature that allows your HDMI devices to communicate with one another automatically through your television. It also allows you to control some of those other devices that are connected to the television’s HDMI ports simply by using the TV remote.
No need to use a different remote for each device, which can get confusing.
Although this feature can be convenient, it has been reported to be a potential cause for a Samsung TV turning on by itself. The only solution is to disable Anynet+ by taking the following steps.
- Go to the main Menu and select System.
- Next, click on Anynet+ (HDMI-CEC).
- Press Anynet+ (HDMI-CEC) again on the next menu.
- A toggle menu will appear that lets you switch from on to off.
- Set Anynet+ to off and it should be disabled.+
3. Disable Sleep Timer
Do you use your sleep timer frequently to turn on the TV at a certain hour of the day or to shut it off automatically after you have fallen asleep? The problem with your Samsung TV turning on by itself could be because you either purposefully or accidentally set the timer on the television.
If you need to disable the sleep timer on your Samsung TV, take the following steps.
- Go to the Main Menu on your TV.
- Select Settings and then General.
- Find System Manager and click on it.
- This should bring up a menu displaying settings for your sleep timer.
- Go ahead and disable the sleep timer.
4. Disable SmartThings
SmartThings on the Samsung Smart TV is an application that gives you the ability to control multiple devices at the same time. There are other features as well that include turning lights on and off, adjusting the temperature of your thermostat, and locking your house doors from anywhere via the phone app.
Some users of the SmartThings app have reported that their TV turns on when a nearby device that is connected to the SmartThings app powers on or is in proximity. This will cause you to waste a lot of electricity, which defeats the point of buying an efficient TV.
For example, if your smartphone is connected to your TV through the SmartThings app, simply walking into the same room as the television with your phone in hand could power on the TV.
If you are looking to disable SmartThings, take the following steps.
- Go to the Home menu and find Settings.
- Click on Settings and then General.
- Navigate to Network and then Expert Settings.
- In Expert Settings, located Power On with Mobile and switch it to off.
5. Upgrade the Firmware
If you are running outdated software on your Samsung Smart TV, it could be causing several issues like difficulty running apps, being unable to sync with other devices, and it could cause your TV to turn on without being prompted to do so.
If you are having problems with your Samsung television, you should always check to see if you have the latest version of the Samsung Smart TV OS installed on your television. To see which version you currently are running, go to the Home menu and look at the System option. If there is a recent update that has not been installed, you should say it here and you can install it by clicking on it.
If you currently have the latest version, you could also try reinstalling it to see if it can give your TV the OS reset it needs to begging to function normally.
6. Power-cycle your Samsung TV
One of the most common solutions for any type of issue coming from a Samsung Smart TV is to power-cycle the television. Power cycling allows the TV to reset itself which can fix some basic problems you may be experiencing.
To power–cycle your Samsung Smart TV, take the following steps.
- With the TV powered on, unplug the power cord from the wall.
- Let the TV sit for 30 to 60 seconds.
- During this time, hold down the power button for 30 seconds to release any residual power.
- Last, plug the power cord back into the wall outlet.
7. Disable Eco mode
Some Samsung Smart TV owners have reported that they had problems with their television sets after enabling Eco mode. Eco mode on a Samsung TV is there to help save power by turning off particular settings when not in use. Sometimes this Eco mode can cause problems with Samsung televisions with no plausible explanation.
To disable Eco mode on your Samsung Smart TV, take the following steps.
- In the Home menu, go to Settings and then General.
- In General, locate the Eco mode option.
- In this menu, you can select to turn on or turn off Eco mode, power saving mode, and motion detection.
If you see that you have motion detection set to on, this could also be a cause of your issue.
8. Replace faulty PSB capacitors
Capacitors are located both in the power supply board (PSB) and the input board. If you are having problems with your Samsung Smart TV, you may have to replace some or all of the capacitors located on the power supply board.
To replace any faulty PSB capacitors your TV may have, take the following steps.
- Unplug the Samsung TV from its power source.
- If the TV is mounted to the wall, remove it from the wall mount.
- Lay the TV flat on a large surface.
- Lay down a towel between the TV screen and the surface to prevent scratches.
- Disconnect the input, display, and hardware buttons and wires.
- Examine the power supply board and look for any blown capacitors.
- If you see any of the capacitors with swollen tops, then you will need to replace them.
9. Replace the main logic board
After you have replaced all of the capacitors in the power supply board you still are having problems, then you may need to replace the main logic board.
The main logic board is responsible for capturing video and analog signals and converting them to digit signals to be transmitted to the T-con board.
If you need to replace the main logic board, follow these steps.
- Unplug your television from the and place it face-down on a flat surface.
- Put a towel under the screen to prevent scratches from the surface.
- Unscrew the back panel on your TV.
- Check the board with a multimeter and examine it for any signs of damage.
- The board may be swollen, warped, or burned in particular areas.
- Use the multimeter to check for resistance.
- Use the multimeter on each component of the board until you find the faulty part.
- Replace the faulty part and reassemble your Samsung television.
10. Samsung TV support
If you have tried everything and even replaced faulty parts in the motherboard and faulty capacitors in the power supply board, then you may have to contact Samsung TV Support. At Samsung TV Support, you can arrange for an at-home service appointment, find any and all of the resources you would ever need, and register your product for its warranty coverage.
11. Samsung TV warranty
The Samsung TV warranty is a limited warranty that is only valid on products that have been installed, operated, and maintained according to the instructions attached to the television. The warranty period is 1 year from the purchase date. The 1-year warranty covers service and parts.
Having power issues with your TV that can cause it to turn on and off on its own is not as uncommon as you think.
Many Samsung TV owners have reported similar problems. They often can fix the problems on their own by troubleshooting the issue and disabling certain features, power-cycling the TV, and replacing specific faulty parts.
If none of these potential solutions is effective at getting your TV to work normally, then you may need to reach out to Samsung to see what your options are. Samsung may be more than willing to send out a service technician or mail you replacement parts if the TV is still covered by its 1-year warranty.