Exact model-family answer directory

Samsung Q90T QLED TV troubleshooting

Choose the symptom actually shown by QN55/65/75/85Q90T*. 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 Q90T QLED TV apps will not open, update or install

For the Samsung Q90T QLED TV, one app, all apps, storage, account/region and service status produce different corrections.

Open record Samsung · eARC

Samsung Q90T QLED TV ARC or eARC soundbar audio is not working

For the Samsung Q90T QLED TV, correct labeled ports, matching CEC/eARC controls, output format and direct-chain testing matter.

Open record Samsung · antenna

Samsung Q90T QLED TV cannot find antenna channels

For the Samsung Q90T QLED TV, antenna input/region, coax path, signal and a fresh channel scan should be verified.

Open record Samsung · colors wrong

Samsung Q90T QLED TV colors look wrong, washed out or tinted

For the Samsung Q90T QLED TV, source format, HDMI range, picture mode, white balance and panel uniformity should be separated.

Open record Samsung · game mode

Samsung Q90T QLED TV game mode, 120 Hz or VRR is not working

For the Samsung Q90T QLED TV, console/game support, HDMI port bandwidth, cable, input mode and format must all align.

Open record Samsung · no sound

Samsung Q90T QLED TV has picture but no sound

For the Samsung Q90T QLED TV, output selection, mute/volume, format and the external audio path should be isolated.

Open record Samsung · no picture

Samsung Q90T QLED TV has sound but no picture

For the Samsung Q90T QLED TV, built-in menus versus every external input separates panel/backlight faults from HDMI/source problems.

Open record Samsung · restarting

Samsung Q90T QLED TV keeps restarting or will not stay on

For the Samsung Q90T QLED TV, outlet, external devices, sleep/timer/CEC and internal power protection should be isolated.

Open record Samsung · too dark

Samsung Q90T QLED TV picture is too dark or keeps dimming

For the Samsung Q90T QLED TV, ambient/power saving, HDR mode, content mastering and panel behavior should be separated.

Open record Samsung · remote not working

Samsung Q90T QLED TV remote will not control the TV

For the Samsung Q90T QLED TV, infrared power/volume and Bluetooth/RF navigation may be separate paths.

Open record Samsung · flicker

Samsung Q90T QLED TV screen flickers, flashes or goes black intermittently

For the Samsung Q90T QLED TV, trigger, source, cable, refresh/HDR/VRR and built-in menu behavior identify the fault.

Open record Samsung · HDMI no signal

Samsung Q90T QLED TV shows no signal on HDMI

For the Samsung Q90T QLED TV, input selection, source output, cable, port and handshake should be tested in a direct minimal chain.

Open record Samsung · firmware

Samsung Q90T QLED TV software update will not install

For the Samsung Q90T QLED TV, exact model/region, free storage, network and stable power are required.

Open record Samsung · AirPlay

Samsung Q90T QLED TV will not AirPlay, Cast or screen mirror

For the Samsung Q90T QLED TV, protocol support, same-network discovery, guest isolation and protected-content restrictions should be separated.

Open record Samsung · Wi-Fi

Samsung Q90T QLED TV will not connect to Wi-Fi or keeps disconnecting

For the Samsung Q90T QLED TV, tV radio versus router band/security/signal and provider service should be separated.

Open record Samsung · Bluetooth

Samsung Q90T QLED TV will not pair with Bluetooth headphones or speakers

For the Samsung Q90T QLED 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: QN55/65/75/85Q90T*
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 — QLED FALD LCD: 2020 QLED with full-array local dimming — a backlight, so blooming and raised dark-room blacks are normal. Bright and colourful, but LCD, not OLED or Mini-LED.
Gaming / HDMI — only ONE HDMI 2.1 port: The decisive fact: of the four HDMI ports, only ONE (HDMI 4) is HDMI 2.1 and supports 4K 120 Hz and VRR — the other three are HDMI 2.0. A PS5 or Xbox Series X that will not run 4K 120 Hz or VRR on a Q90T is almost always plugged into the wrong port. Move the console to HDMI 4.
No Dolby Vision: HDR10, HDR10+ and HLG only — no Dolby Vision, like all Samsung TVs.
Smart platform: Tizen with Smart Hub (an older Tizen generation). Update at Settings › Support › Software Update; on a 2020 set, an app that stops working can be one whose provider dropped support for this Tizen version — check for an app update before assuming a fault.

Where these figures were read. Samsung Q90T 2020 + SamMobile/FlatpanelsHD (QLED FALD, ONE HDMI 2.1 port = HDMI 4, 120Hz), 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 Q90T QLED 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.

My PS5 won't do 4K 120Hz on my Samsung Q90T.+

On the 2020 Q90T only one HDMI port is HDMI 2.1 — HDMI 4. The other three are HDMI 2.0 and cannot carry 4K 120 Hz or VRR. Move the console to the HDMI 4 input, use a certified Ultra High Speed cable, and enable Game Mode. This is the single most common Q90T gaming problem and it is just the port, not a fault.

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