LG 47LK520 won't turn on. Goes to standby.

[twelvetonine]

I have a LG 47LK520 that was hit by a lightning storm and have been trying to repair it. When plugged in, the red light glows steady and when the power button is pressed the light pulses red every couple of seconds.

Initially I bought a replacement power board thinking that would fix it but doing so didn't change anything. After some research I found out that the capacitors are often the problem however the capacitors on both my replacement board and the original board look fine. No bulges, no leaks, no busted tops.

So after some more research I came across this link:http://blog.workingsi.com/2013/06/li...lw5700-tv.html
and
https://www.badcaps.net/forum/showthread.php?t=23798

which had me pretty convinced that it was the main board.

So I purchased a new main board form ebay, installed it and still no change, the TV was still going to the blinking red light mode. (I ended up returning the replacement mainboard I bought because, while it was the same model number, the heat sink didn't fit in the cover of my TV for some reason.)

So, I'm kinda stuck on what to do next. I was thinking I should by another mainboard as the one I ordered on ebay may have been faulty. I'd really appreaciate any help I can get.

Here are some pics of TV and components: http://imgur.com/a/3rRZn

[twelvetonine]

Re: LG 47LK520 won't turn on. Goes to standby.

Should I get a multimeter and start testing voltages? Is there a guide on how to do this?I'm by no means a noob when it comes to electronics I just would like to know what I'm doing.

[Larry_Ellison]

Re: LG 47LK520 won't turn on. Goes to standby.

How did it go?

Were you able to get the set back up and running?

[mneiland]

Re: LG 47LK520 won't turn on. Goes to standby.

Good question, I was having issues with min (green screen with sound when i turned it on..would last about 5min then normal.) Now it will turn on with no image but white flashing across the top of the screen, after about 10min it turns itself off...