Exact model-family answer directory

Samsung S90C OLED TV troubleshooting

Choose the symptom actually shown by QN55/65/77/83S90C*. Samsung TV; panel type, One Connect box, HDMI 2.1 ports, Tizen year and remote vary by model. Error codes remain separate records because the same characters can mean different things on another platform.

no pictureno soundHDMI no signalWi-Fiapps not workingremote not working

Reviewed records

16 exact answers

Not sure where the fault is?

Samsung · apps not working

Samsung S90C OLED TV apps will not open, update or install

For the Samsung S90C OLED TV, one app, all apps, storage, account/region and service status produce different corrections.

Open record Samsung · eARC

Samsung S90C OLED TV ARC or eARC soundbar audio is not working

For the Samsung S90C OLED TV, correct labeled ports, matching CEC/eARC controls, output format and direct-chain testing matter.

Open record Samsung · antenna

Samsung S90C OLED TV cannot find antenna channels

For the Samsung S90C OLED TV, antenna input/region, coax path, signal and a fresh channel scan should be verified.

Open record Samsung · colors wrong

Samsung S90C OLED TV colors look wrong, washed out or tinted

For the Samsung S90C OLED TV, source format, HDMI range, picture mode, white balance and panel uniformity should be separated.

Open record Samsung · game mode

Samsung S90C OLED TV game mode, 120 Hz or VRR is not working

For the Samsung S90C OLED TV, console/game support, HDMI port bandwidth, cable, input mode and format must all align.

Open record Samsung · no sound

Samsung S90C OLED TV has picture but no sound

For the Samsung S90C OLED TV, output selection, mute/volume, format and the external audio path should be isolated.

Open record Samsung · no picture

Samsung S90C OLED TV has sound but no picture

For the Samsung S90C OLED TV, built-in menus versus every external input separates panel/backlight faults from HDMI/source problems.

Open record Samsung · restarting

Samsung S90C OLED TV keeps restarting or will not stay on

For the Samsung S90C OLED TV, outlet, external devices, sleep/timer/CEC and internal power protection should be isolated.

Open record Samsung · too dark

Samsung S90C OLED TV picture is too dark or keeps dimming

For the Samsung S90C OLED TV, ambient/power saving, HDR mode, content mastering and panel behavior should be separated.

Open record Samsung · remote not working

Samsung S90C OLED TV remote will not control the TV

For the Samsung S90C OLED TV, infrared power/volume and Bluetooth/RF navigation may be separate paths.

Open record Samsung · flicker

Samsung S90C OLED TV screen flickers, flashes or goes black intermittently

For the Samsung S90C OLED TV, trigger, source, cable, refresh/HDR/VRR and built-in menu behavior identify the fault.

Open record Samsung · HDMI no signal

Samsung S90C OLED TV shows no signal on HDMI

For the Samsung S90C OLED TV, input selection, source output, cable, port and handshake should be tested in a direct minimal chain.

Open record Samsung · firmware

Samsung S90C OLED TV software update will not install

For the Samsung S90C OLED TV, exact model/region, free storage, network and stable power are required.

Open record Samsung · AirPlay

Samsung S90C OLED TV will not AirPlay, Cast or screen mirror

For the Samsung S90C OLED TV, protocol support, same-network discovery, guest isolation and protected-content restrictions should be separated.

Open record Samsung · Wi-Fi

Samsung S90C OLED TV will not connect to Wi-Fi or keeps disconnecting

For the Samsung S90C OLED TV, tV radio versus router band/security/signal and provider service should be separated.

Open record Samsung · Bluetooth

Samsung S90C OLED TV will not pair with Bluetooth headphones or speakers

For the Samsung S90C OLED TV, tV eligibility, competing hosts, pairing mode, distance and audio-output support should be isolated.

Open record

Confirm the model first

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

Every answer below is scoped to these model identifiers. A neighbouring model in the same line can use a different part, a different reset sequence or a different radio, so matching the identifier before following a procedure is the step that decides whether the rest of the page applies to you.

Model numbers and patterns: QN55/65/77/83S90C*
What that covers: Samsung TV; panel type, One Connect box, HDMI 2.1 ports, Tizen year and remote vary by model.

Published specification

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

These are the properties that decide which procedure applies. Each is read from the manufacturer’s own published figures for this model, not carried over from a sibling that shares its retail name.

Panel — QD-OLED: 2023 QD-OLED (self-emissive, perfect blacks, no backlight). Note some sizes shipped with a QD-OLED panel and others with an LG WOLED panel depending on supply, but Samsung's stated behaviour is the same; either way it is self-emissive, so 'dimming' is the Auto Brightness Limiter, not a backlight.
No Dolby Vision: HDR10, HDR10+ and HLG only — no Dolby Vision, like all Samsung TVs.
Smart platform: Tizen with Smart Hub, Gaming Hub and Game Bar. Inputs are on the TV (no One Connect box, unlike the S95C). Update at Settings › Support › Software Update.
Gaming / HDMI: Four HDMI 2.1 ports (48 Gbps) with 4K 144 Hz, VRR and ALLM. Turn on Game Mode; the Game Bar confirms the live refresh/VRR.
Panel: An OLED panel, where each pixel emits its own light. Dark mode genuinely reduces consumption because black pixels are switched off, and a static bright element left on screen for very long periods is the one wear risk this panel type has that LCD does not.

Where these figures were read. Samsung S90C 2023 spec sheet + gsmarena/AVS (QD-OLED, 4×HDMI 2.1 48Gbps, 144Hz, no One Connect), read 2026-09-01

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

Exact questions

Questions that only have an answer for the Samsung S90C OLED TV

Each answer below uses this model’s own published figures. The same question asked about a different model in the line has a different answer, which is why it is answered here rather than on a general page.

Is the Samsung S90C the same as the S95C?+

Both are 2023 QD-OLED, but the S95C adds the external One Connect box (all inputs off the TV) and is brighter, while the S90C keeps its inputs on the panel and is the value QD-OLED. Both run Tizen, lack Dolby Vision, and offer four HDMI 2.1 ports with 4K 144 Hz and VRR.

Structured depth, not empty permutations

Every published record carries a direct answer, scope, ordered fixes, risk notes and sources.

Device and manufacturer hubs share a consistent record system, but each answer carries the relevant controls, fault boundaries, consequences and official support entry point for that platform.

See the publication gate