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Samsung S95C OLED TV troubleshooting

Samsung S95C OLED TV (QN55/65/77S95C*): what the S95C is; the One Connect box; power and restarts; updating; standby behavior; placing a QD-OLED, and a fix for each symptom below.

What the S95C is
A large bright window that dims is the Auto Brightness Limiter, not a backlight fault.

No pictureNo soundHDMI no signalWi-FiApps not workingRemote not working

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Samsung · restarting

Samsung S95C OLED TV keeps restarting or will not stay on

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Which units this covers, and how to tell yours is one of them

Model numbers and patterns: QN55/65/77S95C*

Published specification

What is true of this model and changes how you fix it

Panel — QD-OLED
2023 QD-OLED (self-emissive, perfect blacks, no backlight, very saturated color). A large bright window dimming is the Auto Brightness Limiter, not a backlight fault.
One Connect box
All inputs are on a separate One Connect box; the panel has none. Signal/HDMI/ARC troubleshooting happens at the box and its cable.
Smart platform / gaming
Tizen, Smart Hub, Gaming Hub, Game Bar. Four HDMI 2.1 (on the box) at 40 Gbps with 4K 144 Hz, VRR and ALLM. Update at Settings › Support › Software Update; screen share Smart View / AirPlay 2.
The One Connect box
All inputs are on a separate One Connect box, and the panel has none. There are no inputs on the back of the TV, which is correct.
Power and restarts
The TV and the box have a combined power arrangement, and a TV that restarts or turns off by itself has a cause in power, heat, a setting such as a sleep timer or an update.
Updating
Settings, Support, Software Update. An update can restart the TV by design.
Standby behavior
Samsung TVs stay in a standby that listens for the remote and the network, so a TV that wakes by itself may be responding to a device or an app.
Placing a QD-OLED
The S95C is thin enough to sit on a stand or a wall bracket, with the One Connect box hidden away on a shelf. Leave a gap around the box for air, and keep the long cable between box and panel unkinked, since a damaged cable causes a black screen and no picture while sound continues.
Burn-in care on a QD-OLED
Self-emissive panels can retain a static logo if the same bright image is held for many hours. Use the TV's Pixel Refresh and Pixel Shift options, leave the TV in standby after use so the maintenance routines can run, and avoid leaving a paused game menu on screen overnight.
Anti-glare screen
The screen has a matte, low-glare finish, so a bright window opposite the TV shows as a dim sheen rather than a sharp reflection. That sheen lifts black in a bright room and is a normal effect of the coating, not a panel fault.

Where these figures were read. image-us.samsung.com/SamsungUS/samsungbusiness/tv-ci-resources/S95C_Spec_Sheet.pdf (Samsung US spec sheet) (QD-OLED, One Connect, 4×HDMI 2.1 40Gbps, 144Hz)

Manufacturer support for this product line. Samsung Support — TV support. Official Samsung TV manuals, software, diagnostics and repair entry point.

Also read for this model. Samsung Support — Samsung TV support.

Exact questions

Questions that only have an answer for the Samsung S95C OLED TV

My Samsung S95C has no inputs on the back of the TV.+

That is correct — the S95C puts every HDMI and other input on its separate One Connect box, which connects to the panel with one slim cable. Plug your sources into the box and troubleshoot signal problems there. It is the same design as the QN95D and S95D.

My Samsung S95C has no inputs on the back. Is that right?+

Yes, they are on the One Connect box.

Why does it restart by itself?+

Power, a setting or an update.

Does it do 144 Hz?+

Yes, on its HDMI 2.1 ports.

Where is the model number?+

On the back and in About This TV.