LG OLED clicks twice and turns off

In short

If your LG OLED clicks twice (click-click) on power-on and then turns off or stays black, the start chain often engaged — and protection aborted the boot again.

Many users call it clicks but no picture: the relay / soft-start on the power supply board briefly engages without image or sound. The cause can be the power supply board, but it does not have to be: a short toward the mainboard or high panel load are also possible — not automatically the expensive panel itself.

What the click-click usually means

The relay is an electrically operated switch on the power supply board. The click at power-on comes from it. A single switch sound at power-on can be normal. Two short clicks then darkness suggest supply and protection cycling in a short loop.

Sometimes a blink pattern on the red / standby LED follows. Flash counts vary by series and year — there is no universal official LG table for every chassis. Count and document what *your* set shows (including 3× / 4× / continuous blinking).

• Click-click on power-on, then off immediately or after seconds
• No picture, no sound — only click or brief LED activity
• Sometimes blinking red LED / boot-loop-like pattern afterward
• After unplugging, brief different state, then the same click-click

Common causes: power supply board, short, panel load

In practice three suspects lead: aging parts on the power supply board (including film capacitors), a short or load fault toward the mainboard, or panel load that trips protection. Rule of thumb: if the standby LED first lights normally and briefly goes off, flashes, or the relay clicks when switching on, the fault can be in the power supply board, but it does not have to be. The mainboard or panel are also possible.

Deep dive on no-power and 820 nF film caps: LG OLED won't turn on. Blink codes: red LED blinking. Turns off after a successful start: turns itself off.

Safety notice

Mains voltage is lethal. Open chassis and power supply board mean dangerous voltages. Electrolytics can hold charge after unplugging — discharge before measuring or desoldering. Never work under power. The large electrolytic capacitors can hold up to about 400 V even after switching off: wait at least 2 hours, measure with a range of at least 600 V and only continue once the voltage is ideally below 30 V.

Unsure? Unplug, do not open, leave diagnosis to a workshop. AmparioWeb offers tested parts and fixed-price repair.

What you can check safely (no live work)

Goal is triage, not live debugging:

• Rule out another mains cable / outlet
• Document click pattern and any LED blinking on video
• Note model and board numbers (EAY / EAX) — Find number
• Whether the fault is intermittent

When AmparioWeb helps

With click-click and no picture, map power supply board / mainboard / load before discussing a panel swap. AmparioWeb identifies boards, supplies tested parts and repairs power supply boards at a fixed price. We do not offer mainboard repairs.

Next: Repair or Parts.