LG OLED TVs are some of the best sets you can buy, but when one won’t turn on, it can be hard to tell whether it’s a simple glitch or a hardware fault. Here’s how to work it out.
Try a power reset first
- Switch the TV off at the wall and unplug it.
- Wait at least 60 seconds so the power supply fully discharges.
- Plug it back in, straight into a wall socket, and turn it on with the button on the TV rather than the remote.
If it starts normally, check for a webOS update once it’s running. If not, read on.
What the standby light tells you
- No light at all. The TV isn’t getting standby power. Check the cable and socket; if those are fine, the power supply board is the likely cause.
- Red light on, but nothing happens. Standby power is present, but the TV isn’t starting. This can be the mainboard, the power board’s main supply or the IR/button board.
- Light blinks, or the TV starts and shuts down. The TV has detected a fault and is protecting itself. This often points to the power supply or the panel electronics.
Common LG OLED faults
Power supply board
OLED panels draw a lot of power on bright scenes. Over time, components on the power board age and the TV can fail to start or shut down under load.
Mainboard and firmware
A corrupted firmware update or a failing mainboard can leave the TV stuck on the logo or in a boot loop. We can reload firmware or repair the board.
Panel electronics
OLED panels have their own driver boards. Faults here can cause no picture, lines or a flashing screen. Some are repairable; a damaged panel usually isn’t worth replacing.
Don’t forget the warranty
If your TV is still under LG’s warranty, contact LG first. Out of warranty, we repair LG OLED and LED TVs at our Minchinbury workshop and quote before starting. More on LG TV repair.