# Replace the LG OLED power supply board

> Swap the LG OLED PSU / power module: find the EAY number, cost vs manufacturer, safety (discharge caps). AmparioWeb supplies tested boards and fixed-price repair.

## In short

Many out-of-warranty series (**B9**, **CX**, **C1**, **BX** and related) can be saved by replacing the **power supply board** (**PSU** / power module) — instead of writing off the whole TV.

You need the correct **EAY** / board number, a **tested** replacement, and solid safety. Blind-buying used boards with the same aging damage is expensive roulette.

## Find the EAY number — do not guess

LG OLED PSUs typically carry an **EAY…** part number (and often an **EAX** PCB id). Without it, fit is unreliable — connectors, voltage variants and revisions differ.

How-to: read model label + board number — [Find number](/en/nummer-finden), then search [Parts](/en/bauteile).

## Why the power module is the weak point

On many LG OLED PSUs, filter capacitors and related parts age. Symptoms: no start, click without picture, self-shutdown, blink codes. The **power module** is often the economical repair level — not the panel.

Background: [won't turn on](/en/blog/lg-oled-fernseher-geht-nicht-mehr-an) and [Carli capacitors](/en/blog/lg-oled-carli-kondensatoren).

## Safety — before opening

**Unplug the mains.** Wait, and **discharge electrolytics** on the **PSU** before unplugging connectors or measuring. **Mains and residual charge are lethal.** Never work under power.

Unsure? Do not open — send it for [Repair](/en/reparatur).

## DIY swap vs manufacturer cost

Manufacturer service after warranty is often expensive. A **tested replacement PSU** or fixed-price board repair is cheaper for many B9/CX/C1/BX cases — if diagnosis points to the PSU.

AmparioWeb tests boards before shipping and avoids untested used stock with the same film caps.

- Note and map EAY/EAX
- Unplug, wait, discharge electrolytics
- Photograph ribbon/power connectors
- Fit the new board, verify latches, then apply mains
- Do not “try boards” if fuse/short is suspected

## What AmparioWeb offers

Correct **PSU** identification, tested boards and fixed-price repair — including B9, CX, C1, BX.

Start: [Find number](/en/nummer-finden), [Parts](/en/bauteile) or [Repair](/en/reparatur).

## FAQ

**Is the TV model number enough?**

Often not. Prefer the board **EAY** — see [Find number](/en/nummer-finden).

**Can I fit any used PSU?**

Risk: same aging capacitors. Prefer a **tested** AmparioWeb board.

**Do I need to solder?**

Full board swap is mostly screws/connectors — residual charge is still dangerous. Component-level PSU repair is for specialists.

**Which series are typically OOW?**

Often requested: **B9**, **CX**, **C1**, **BX** — the wear pattern spans many OLED PSU families.

**Repair or replace?**

Both work. AmparioWeb helps choose — [Repair](/en/reparatur) vs [Parts](/en/bauteile).