Exact model-family answer directory

LG TV line troubleshooting

LG TV line (OLED C4, with the other LG OLED, QNED and UHD models in the model notes): processor and panel (from LG's product page); formats; software updates; HDMI, and a fix for each symptom below.

  • Processor and panel (from LG's product page)
    The Alpha 9 AI Processor Gen7 drives an OLED panel of over 8.3 million self-lit pixels, with a 144 Hz refresh rate for gaming.
No pictureNo soundHDMI no signalWi-FiApps not workingRemote not working

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8 exact answers

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

Model numbers and patterns
OLED C4, with the other LG OLED, QNED and UHD models in the model notes; also B5 OLED TV (OLED48/55/65/77/83B5*); C2 OLED TV (OLED42/48/55/65/77/83C2*); G3 OLED evo TV (OLED55/65/77/83G3*); M4 wireless OLED TV (OLED65/77/83/97M4*); UR9000 UHD TV (43/50/55/65/75UR9000*)

Published specification

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

Where these figures were read. lg.com/us/tvs/lg-oled65c4pua-oled-4k-tv.com OLED C4 product page + What Hi-Fi 2024 LG lineup (α9, no MLA, 144Hz)

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

Also read for this model. LG — OLED65C4PUA product page; RTINGS — LG C4 OLED review; Tom's Guide — LG B5 OLED review; Tom's Guide — LG C2 OLED TV review; RTINGS — LG C2 OLED review; Tom's Guide — LG G3 OLED TV review; T3 — LG OLED M4 review; FlatpanelsHD — LG begins rollout of 'wireless' M4 OLED TVs; LG USA — 65UR9000PUA 4K UHD Smart TV; LG USA — 65UR9000PUA support page.

Exact questions

Questions that only have an answer for the LG TV line (OLED evo, QNED and UHD)

My LG C4 won't hit 144Hz.+

Use an HDMI 2.1 port with a certified 48 Gbps Ultra High Speed cable and turn on Game Optimizer for that input; the source (PC or console) must also be set to output 120/144 Hz. The C4 supports up to 144 Hz on all four ports, but it stays at 60 Hz until the input mode and the source are both switched.