# LG OLED standby LED off

> LG OLED standby LED off and won't turn on? Dead set vs PSU start chain — AmparioWeb helps with diagnosis, repair and parts.

## In short

If the **LG OLED standby LED is off** and the TV **won't turn on**, the set often feels fully dead — no blink, no click, no remote response.

Classic **PSU** suspicion (**PSU**, Power Supply Unit / power board): standby rail missing or start chain never begins. Not every dead set needs a new panel.

## What “standby LED off” means

The **standby LED** normally shows that at least part of the supply is alive. **Permanently off** with the plug in often means the standby rail is already missing.

Contrast: [red LED blinking](/en/blog/lg-oled-rote-led-blinkt), [stays black](/en/blog/lg-oled-bleibt-schwarz), [won't turn on](/en/blog/lg-oled-fernseher-geht-nicht-mehr-an).

- No LED after plugging in
- Remote and side button dead
- No relay click
- Sometimes brief LED after unplug, then dead again

## Why often the PSU

Many LG OLED power boards provide a **standby voltage**. If it fails, the LED stays off and the set never starts.

Mainboard faults can also darken the LED — triage still usually starts at the **PSU**. See [mainboard or PSU](/en/blog/lg-oled-mainboard-oder-netzteil).

## Safety

**Mains is lethal.** Open chassis and **PSU** = dangerous voltages. Discharge electrolytics. **Never work live.**

## Checks without voltage

Triage only:

- Other outlet / cable
- Document any brief LED (video)
- Model + board number — [find number](/en/nummer-finden)
- Recent surge/RCD trip — [fuse/surge](/en/blog/lg-oled-sicherung-ueberspannung)

## When AmparioWeb helps

**Standby LED off** + won't turn on → PSU/start-chain diagnosis before panel talk.

Next: [repair](/en/reparatur), [parts](/en/bauteile).

## FAQ

**Dead panel if LED is off?**

Unlikely as first suspect. Missing standby often means **PSU**.

**Vs blinking LED?**

Blink = fault report. Fully off = often no standby supply.

**Unplugging help?**

Sometimes briefly; if it returns → hardware.

**Which part first?**

No blind buy — [find number](/en/nummer-finden).

**AmparioWeb?**

Yes — [support](/en/support) or [repair](/en/reparatur).