Exact model-family answer directory

LG CX OLED TV troubleshooting

Choose the symptom actually shown by OLED48/55/65/77CX*. LG TV; OLED/QNED/LCD panel, webOS year, HDMI bandwidth and Magic 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?

LG · apps not working

LG CX OLED TV apps will not open, update or install

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

Open record LG · eARC

LG CX OLED TV ARC or eARC soundbar audio is not working

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

Open record LG · antenna

LG CX OLED TV cannot find antenna channels

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

Open record LG · colors wrong

LG CX OLED TV colors look wrong, washed out or tinted

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

Open record LG · game mode

LG CX OLED TV game mode, 120 Hz or VRR is not working

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

Open record LG · no sound

LG CX OLED TV has picture but no sound

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

Open record LG · no picture

LG CX OLED TV has sound but no picture

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

Open record LG · restarting

LG CX OLED TV keeps restarting or will not stay on

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

Open record LG · too dark

LG CX OLED TV picture is too dark or keeps dimming

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

Open record LG · remote not working

LG CX OLED TV remote will not control the TV

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

Open record LG · flicker

LG CX OLED TV screen flickers, flashes or goes black intermittently

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

Open record LG · HDMI no signal

LG CX OLED TV shows no signal on HDMI

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

Open record LG · firmware

LG CX OLED TV software update will not install

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

Open record LG · AirPlay

LG CX OLED TV will not AirPlay, Cast or screen mirror

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

Open record LG · Wi-Fi

LG CX OLED TV will not connect to Wi-Fi or keeps disconnecting

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

Open record LG · Bluetooth

LG CX OLED TV will not pair with Bluetooth headphones or speakers

For the LG CX 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: OLED48/55/65/77CX*
What that covers: LG TV; OLED/QNED/LCD panel, webOS year, HDMI bandwidth and Magic 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: 2020 OLED (WOLED, pre-evo) with the Alpha 9 Gen3 processor — self-emissive, perfect blacks, no backlight. On a panel this age, faint uniform near-black variation and normal ABL dimming are expected, not defects.
Smart platform: The older webOS (2020 platform) with the Magic Remote. This is the oldest LG TV in this library, and app support is the key issue: some streaming apps have dropped or no longer update on this webOS generation. Check the LG Content Store first; where an app is gone, an external streamer is the fix, not a TV repair.
Gaming / HDMI: Four HDMI 2.1 ports at 4K 120 Hz with VRR, ALLM and G-Sync — but at 40 Gbps, not the 48 Gbps of later models, so a few of the most demanding 4K 120 formats (e.g. 12-bit) are outside its bandwidth. That is a spec ceiling, not a fault.

Where these figures were read. lg.com OLED CX product page + FlatpanelsHD 2020 lineup (α9 Gen3, 4×HDMI 2.1 40Gbps 4K120, webOS 5.0), read 2026-09-01

Manufacturer support for this product line. LG Support — TV and home theater support. Official LG television manuals, webOS support, diagnostics and repair entry point.

Exact questions

Questions that only have an answer for the LG CX 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.

My LG CX won't run a streaming app any more.+

The CX is a 2020 TV on an older webOS, and the most common cause is the app provider ending support for that webOS version. Check the LG Content Store for an update and cold-restart the TV. If the app has been withdrawn for this generation of webOS, it cannot be restored on the TV itself — an inexpensive external streaming stick brings it back, which is far cheaper than replacing a working panel.

Does the LG CX do 4K 120Hz for my PS5?+

Yes — the CX has four HDMI 2.1 ports with 4K 120 Hz, VRR and ALLM. They run at 40 Gbps rather than the 48 Gbps of newer LGs, so the very highest-bandwidth 4K 120 formats fall outside its range, but standard PS5 and Xbox Series X 4K 120 gaming works. Use a certified cable and turn on Game Optimizer.

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.

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