Exact model-family answer directory

TCL 4-Series Roku TV S455 troubleshooting

Choose the symptom actually shown by 43/50/55/58/65/75/85S455. TCL TV; Roku TV, Google TV and Fire TV platforms use different menus and app stores. 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?

TCL · apps not working

TCL 4-Series Roku TV S455 apps will not open, update or install

For the TCL 4-Series Roku TV S455, one app, all apps, storage, account/region and service status produce different corrections.

Open record TCL · eARC

TCL 4-Series Roku TV S455 ARC or eARC soundbar audio is not working

For the TCL 4-Series Roku TV S455, correct labeled ports, matching CEC/eARC controls, output format and direct-chain testing matter.

Open record TCL · antenna

TCL 4-Series Roku TV S455 cannot find antenna channels

For the TCL 4-Series Roku TV S455, antenna input/region, coax path, signal and a fresh channel scan should be verified.

Open record TCL · colors wrong

TCL 4-Series Roku TV S455 colors look wrong, washed out or tinted

For the TCL 4-Series Roku TV S455, source format, HDMI range, picture mode, white balance and panel uniformity should be separated.

Open record TCL · game mode

TCL 4-Series Roku TV S455 game mode, 120 Hz or VRR is not working

For the TCL 4-Series Roku TV S455, console/game support, HDMI port bandwidth, cable, input mode and format must all align.

Open record TCL · no sound

TCL 4-Series Roku TV S455 has picture but no sound

For the TCL 4-Series Roku TV S455, output selection, mute/volume, format and the external audio path should be isolated.

Open record TCL · no picture

TCL 4-Series Roku TV S455 has sound but no picture

For the TCL 4-Series Roku TV S455, built-in menus versus every external input separates panel/backlight faults from HDMI/source problems.

Open record TCL · restarting

TCL 4-Series Roku TV S455 keeps restarting or will not stay on

For the TCL 4-Series Roku TV S455, outlet, external devices, sleep/timer/CEC and internal power protection should be isolated.

Open record TCL · too dark

TCL 4-Series Roku TV S455 picture is too dark or keeps dimming

For the TCL 4-Series Roku TV S455, ambient/power saving, HDR mode, content mastering and panel behavior should be separated.

Open record TCL · remote not working

TCL 4-Series Roku TV S455 remote will not control the TV

For the TCL 4-Series Roku TV S455, infrared power/volume and Bluetooth/RF navigation may be separate paths.

Open record TCL · flicker

TCL 4-Series Roku TV S455 screen flickers, flashes or goes black intermittently

For the TCL 4-Series Roku TV S455, trigger, source, cable, refresh/HDR/VRR and built-in menu behavior identify the fault.

Open record TCL · HDMI no signal

TCL 4-Series Roku TV S455 shows no signal on HDMI

For the TCL 4-Series Roku TV S455, input selection, source output, cable, port and handshake should be tested in a direct minimal chain.

Open record TCL · firmware

TCL 4-Series Roku TV S455 software update will not install

For the TCL 4-Series Roku TV S455, exact model/region, free storage, network and stable power are required.

Open record TCL · AirPlay

TCL 4-Series Roku TV S455 will not AirPlay, Cast or screen mirror

For the TCL 4-Series Roku TV S455, protocol support, same-network discovery, guest isolation and protected-content restrictions should be separated.

Open record TCL · Wi-Fi

TCL 4-Series Roku TV S455 will not connect to Wi-Fi or keeps disconnecting

For the TCL 4-Series Roku TV S455, tV radio versus router band/security/signal and provider service should be separated.

Open record TCL · Bluetooth

TCL 4-Series Roku TV S455 will not pair with Bluetooth headphones or speakers

For the TCL 4-Series Roku TV S455, 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: 43/50/55/58/65/75/85S455
What that covers: TCL TV; Roku TV, Google TV and Fire TV platforms use different menus and app stores.

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 — entry direct-lit LED (no QLED): The 4-Series S455 is TCL's entry tier: a direct-lit LED LCD with no quantum-dot QLED layer and no local dimming. Blacks are grey in a dark room and backlight uniformity is more visible; that is the limit of the tier, not a defect.
Smart platform — ROKU TV: Runs Roku OS built in. Update at Settings › System › System update; Miracast/AirPlay 2 mirroring; Roku remote and app store. Not Google TV.
Picture / gaming limits: 4K resolution with HDR10 and HLG (limited HDR impact because the panel is not bright), a native 60 Hz panel and HDMI 2.0 — no 4K 120 Hz or VRR. A request for high-refresh or strong HDR is beyond this model's hardware.

Where these figures were read. TCL 4-Series S455 spec + RTINGS (direct-lit LED, 60Hz, ROKU TV), read 2026-09-01

Manufacturer support for this product line. TCL Support — TV support. Official TCL manuals, firmware, Roku TV and Google TV troubleshooting support.

Exact questions

Questions that only have an answer for the TCL 4-Series Roku TV S455

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.

Why does HDR look dull on my TCL 4-Series?+

The 4-Series S455 is an entry direct-lit LED TV without QLED colour or local dimming, and it is not bright enough to show much HDR impact — so HDR content can look flat or dull. That is the hardware tier, not a fault or a wrong setting. Brighter HDR needs a QLED (5-Series and up) or a Mini-LED TCL.

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