If a Samsung TV restarts on its own, it could be a stuck power button or a faulty power supply. The problem is usually a hardware defect. If the Samsung TV is still under warranty, the company can repair this technical problem for free. If your Samsung Smart TV keeps restarting, it could be due to outdated software or loose power cables.
The next section will detail in more detail the quick solutions you can do for your Samsung smart TV. If your warranty is intact, contact Samsung customer service to help you replace it and ensure an effective solution to the power cycle. In some cases, frequent restarts of the Samsung Smart TV could be due to a faulty motherboard. The TV's power supply may have faulty capacitors, hence the reason your Samsung Smart TV keeps restarting.
If your Samsung TV keeps restarting after following the steps above, it's time for a longer-term solution. If your Samsung TV keeps restarting after trying the above methods, you can reset all current settings so that it returns to the default settings. Several factors can explain why your Samsung smart TV restarts or shuts down every 5 seconds. However, it could be due to old or outdated software or loose power cables if your Samsung smart TV keeps restarting.