Lg 37lc55

[junger]

Hi All
I have had a couple of the same model giving the same sympton on
LG 37LC55.
When switched on you get no picture, If the LCD is left on for say 15minutes and then the mains cable is unplugged and reinserted then it works perfectly well. I have looked at the caps on the power board and they are not bubbled/dry.
Any ideas, anything I can try?
Thanks
Junger

[budm]

Re: Lg 37lc55

Bad cap can look normal but it can have high ESR. What you can do is this, heat up the power supply board with hair dryer, then pug in the TV and see if it will come on. ESR will go down when cap is heated up. It sure sounds like bad caps to me.

[tom66]

Re: Lg 37lc55

The LG 37LC46, 37LC55, 42LC46 and 42LC55 are prone to four bad caps on the PSU going bad. More Samwha WBs.

[junger]

Re: Lg 37lc55

hi
which caps are they, so that I can inspect them closer, Thanks for the hairdryer tip, I will try that

[psmedley]

Re: Lg 37lc55

http://www.ohmsupplies.co.uk/LG-37LC...301-REPAIR-KIT

LG 37LC55 REPAIR KIT

BOARD MARKED EAY34796801, EAX32268301

FAULT SYMPTOMS:

STAND BY
FLASHING LED
DEAD
WHATS IN THE KIT:

C217
C218
C226
C210
C221
C206
C222
C208

[junger]

Re: Lg 37lc55

hi all
The fault has developed further,now I can see in the back, when switched on the hv lights up, after about 10 mins the hv lights strobe/flash and then goes back to normal.
I have replaced the PSU board from my mates LG (same model) and it was the same, so I changed the main board and the fault travelled with the board. so the fault is on the main processing board, any ideas?

[selldoor]

Re: Lg 37lc55

Pictures top and bottom of your main board might help.
Did you try the hairdryer trick on the main board.
Please can you update your profile with country and mains voltage.
I will attach instructions for pictures.
Welcome to the forum-
We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed
https://www.badcaps.net/forum/attach...1&d=1290283049

https://www.badcaps.net/forum/attach...7&d=1280167246

It will be useful if you can say a bit about yourself - skills tools etc.