Aug 2, 2020, 8:16 PM
Post #1 of 9
LG 42LB580V LEDs flash at switch on
I've done a bit of reading about this and tried to find the solution but I've drawn a blank so far.
My LG 42LB580V will flash the backlights for about a quarter of a second when I switch the TV on, then they go out. I can see the image with a light etc so I think the main board is OK.
I checked the power board and found that the voltage drops from ~200v to about 3v very quickly after switching on. Easy, just replace the power board I thought. Did that and now have a steady 104v on the output with the LEDs connected and the tv switched on. The symptoms are still identical though.
Is it likely there's a LED issue? I ruled that out as they flash briefly but what am I missing?
Thanks in advance for any help.