Tv plugged into wall and the power button on the remote pressed. It results in a blinking LG logo (Not on the screen, Basically the standby light).

Ive replaced the caps shown in the photo apart from one that I circuled in red (Didnt have the size to hand) and still no luck with it turning on (The old caps didnt look to bad).

You can hear a very slight whine each time the led flashes, But when the logo is blinking if you take out the power lead it continues to flash. You can even wait until it stops blinking and start it blinking again with the power removed, I think this would indicate that no real power is being drawn by the screen.

Where should I start next?

Cheers

Ryan

⟐ Commented 8월 03, 2026 at 10:46 GMT-7

The TV still can be turned on by the remote or the power button. I can hear the click from the powerboard and the red LED on the mainboard will be on. But no picture no sound. My nintendo switch can turn on the TV via HDMI as it normal dose.

Tried disconnecting speaker, control button and remote receiver one by one noting worked.

Tried disconnected the T con board. The power can be turned on for 2 second and then it will restart it self. And the power stay on for another 2 second before turning off.

Bought a mainboard and put it in, but issues are same.

Tested the power suppy board. The power to the mainboard showed in the pictures. The power to the T con board are all 25.1V for the 24V pins and -1.2mV for the GRD pins.

Is there anything I can do? Many thanks.

⟐ Commented 8월 03, 2026 at 10:18 GMT-7

I have an LG 46LD550. Whenever I power it on the display just shows the LG logo and says "No Signal". I have tried power cycling the TV - that didn't work. I reset the TV to factory settings - that didn't work.

I connected my laptop to the TV using an HDMI cable and it can see the TV no problem. I configured the Display settings so my laptop is the Primary and to Mirror the image to the TV. However, when I choose the HDMI port the cable's connected to it says "Connecting" for a few seconds and then returns to saying, "No Signal". I have tried all 4 HDMI ports on the TV and the result is the same with each.

I asked a friend about it and he said he's never had an issue getting any HDMI cable to send a video signal from a laptop to a TV. Still, I can't help but think there's some sort of incompatibility going on because I highly doubt all 4 of the HDMI ports on this TV are bad.

Does anyone have any suggestions as to how I can resolve this issue?

⟐ Commented 8월 02, 2026 at 1:00 GMT-7

⟐ Commented 7월 31, 2026 at 21:19 GMT-7

I have had my LG smart tv for about three years now. The sound for it recently stopped working yesterday feb 20th. I looked online for several solutions to solve the issue but nothing seems to work. Model number. 42LB5600-UZ.AUSDLJM.

Can anyone help me solve this issue if you had it at one point with the same brand?

Thank you

⟐ Commented 7월 28, 2026 at 6:02 GMT-7

⟐ Commented 7월 27, 2026 at 17:32 GMT-7

Every time I turn on screen is blue kind of dark blue still watch the tv, its just hurt on the eyes. The sound of Tv is good, eveything is good just only dark blue on the screen. I hope someone can help me or direct me to fix it. I don't know if that can fix but hopefully still can for my memory.

⟐ Commented 7월 24, 2026 at 18:27 GMT-7

⟐ Commented 7월 24, 2026 at 1:12 GMT-7

⟐ Commented 7월 22, 2026 at 18:41 GMT-7

⟐ Commented 7월 20, 2026 at 17:04 GMT-7

I have an LG 70UN7070PUA, 4k television I'm having a problem with. It's hard to explain but I'm getting these red pixel smears on the screen. They movie around when something on the screen moves. I replaced the TCon board but it's still doing the same thing. It does this on all 3 hdmi ports and no matter what hdmi cables I use. Should I try replacing the main board next, or is something else the problem? Any help would be appreciated.

⟐ Commented 7월 17, 2026 at 14:16 GMT-7

⟐ Answered 7월 06, 2026 at 16:19 GMT-7

⟐ Commented 7월 04, 2026 at 16:45 GMT-7

⟐ Commented 6월 29, 2026 at 21:27 GMT-7

Can anyone help please. Thanks in

⟐ Commented 6월 25, 2026 at 3:03 GMT-7

⟐ Commented 6월 20, 2026 at 6:41 GMT-7

I have this oled tv that wont turn on any more and remains on standy.

I have replaced for brand new:

1. Power supply board
2. T-com board
3. Main board

Issue remais. But I found a way to turn it on without screen

by disconnecting either one of these two connectors

I can hear and go to youtube by memory and play videos all good.

Which of course make me think the problem was a faulty screen.

But my question is, how cant it work even with the screen disconnected (image below), these connectors are unplugged

boards I replaced are brand new but still same issue.

In my head this doesnt make any sense at all, after replacing all and same thing, with screen disconnected

Thanks @oldturkey03.

Model is LG OLED48C1SPA.

Here is the cable I disconnect when it works

Im having trouble understanding how the oled panel can cause this if I disconnected it as image below

Does the OLED panel connects to the boards through other cables?

I have replace 3 boards and oled disconnected and it doesnt work unless I disconnect the cable in the first image above

Here is a complete picture with the 3 boards I replaced.

But the oled screen is disconnected as the second image

⟐ Commented 6월 19, 2026 at 11:11 GMT-7

⟐ Commented 6월 16, 2026 at 20:18 GMT-7