A Samsung S95C that restarts on its own, turns off by itself or cycles on and off has a cause in the power, a setting or the software, and the TV's One Connect design adds a connection to check. This 2023 QD-OLED has all inputs on a separate One Connect box that joins the panel through one slim cable, and four HDMI 2.1 ports. A restart can be a protection against heat or a power fault, an automatic function you did not notice, or a software problem.
The checks in more detail
Start with the settings that switch a TV off. Open Settings, General, System Manager, Time, and check Sleep Timer and the Off Timer, which turn the TV off after a set time. Check Eco Solution, Auto Power Off, which switches off the TV after a period without a remote press, and No Signal Power Off. Check HDMI-CEC, called Anynet+, since a connected device that sends an off command can switch the TV off, and try turning Anynet+ off to test. A restart in the middle of a movie can be the TV updating itself:
check Auto Update in Software Update and turn it off if you prefer to update manually. Then the power and the connections. Plug the TV and the One Connect box into a wall socket directly, not a power strip that is shared with a heater or a big appliance, and avoid an extension that gives a weak supply. Check the One Connect cable from the box to the panel is seated at both ends, since a loose cable causes the picture to drop and the TV to restart.
Check that the box has air around it and is not covered, because overheating causes protective restarts; keep the vents clear. Unplug the TV and the box for a full minute and plug them in again. Disconnect external devices one by one to see whether one causes the restart. Update the software, which fixes known bugs, and consider a factory reset from Settings, General, Reset if it continues. If the TV still restarts with a good socket, a seated cable and no devices, a power board fault is possible, and Samsung service with the model number can advise.
Differential
Likely causes of “Samsung S95C OLED TV keeps restarting or will not stay on”, and how to tell them apart
- 1
A sleep timer or auto power-off
What separates it The TV turns off at the same time
How to confirm Turn off the timers
- 2
An HDMI-CEC command from a device
What separates it The TV switches off when a device does
How to confirm Turn off Anynet+ to test
- 3
An automatic update
What separates it The TV restarts at night or mid-use
How to confirm Check Auto Update
- 4
A weak supply or a loose One Connect cable
What separates it The picture drops and the TV restarts
How to confirm Use a wall socket and reseat the cable
- 5
Overheating or a power fault
What separates it It restarts after running a while
How to confirm Clear the vents; contact Samsung
Before you touch a setting
Record this first — changing settings destroys the evidence
- When it restarts and how often
- What was playing
- Which timers and CEC settings are on
- The software version
Try in this order
0 of 6 completedCheck the timers
ReversibleSleep and Off Timer.
Test with Anynet+ off
ReversibleAnd devices disconnected.
Check Auto Update
ReversibleIn Software Update.
Check the power
ReversibleWall socket, One Connect cable.
Clear the vents
ReversibleOn the box.
Contact Samsung
ReversibleIf it keeps restarting.
Model-specific
What is true of this model and not of its siblings
- Timers
- Sleep and Off timers switch the TV off.
- CEC
- A device can turn the TV off.
- Updates
- They can restart the TV.
- The power supply
- A strip or a weak socket can cause it.
- The box
- It needs air and a seated cable.
- Samsung help
- Quote the model number.
Stop boundary
When this stops being a self-service repair
- !Do not use a damaged power cord
- !Unplug before moving the TV or box
- !Contact Samsung if the TV smells hot
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my S95C restart by itself?+
A timer, a CEC command, an update or a power fault.
What is Anynet+?+
Samsung's HDMI CEC.
Can the One Connect cable cause it?+
Yes, if loose.
Can heat cause it?+
Yes, as a protection.
Should I factory reset?+
If nothing else works.