Troubleshooting · 20 August 2026 · LG Service Center
Confirm the wall outlet, try the physical button on the TV (not only the remote), disconnect HDMI devices, and wait after unplugging for a full power cycle. No backlight with sound is a different fault from a completely dark, silent set.
Separate three situations: no lights at all, a standby LED that never becomes a picture, and sound without an image. They are not the same repair.
Power path
- Try a known-good outlet and avoid cheap overloaded strips.
- Hold the TV’s own power button for several seconds.
- Unplug for two minutes, press the TV power button while unplugged to drain residual charge, then reconnect.
- Disconnect HDMI, USB and soundbars. HDMI-CEC devices can confuse wake behaviour.
Clicking or briefly lighting
A click-repeat or a flash of backlight often points to a power-board protection trip or a shorted LED string on some LCD sets. This is board-level work. Do not “recap by YouTube” on a live chassis.
OLED-specific notes
LG OLED sets have pixel-care routines and can look off while still in a standby or panel-on delay. If the set is under manufacturer warranty, use that path rather than an independent workshop — this site does not replace warranty policy.
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