Re: LG 37LC2D No picture, believe bad power supply



Thanks for all your assistance, I will get the replacement part and attempt a repair.

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Re: LG 37LC2D No picture, believe bad power supply

Both U200 and U204 share the same part numbers:

3037CS
613P IOR
CD4W6

Re: LG 37LC2D No picture, believe bad power supply



All of the Q's and U's for 3.4 and 6 sections check the same way, OPEN, no matter how they are tested in the board. Removed all connectors and they still show same reading. Probably getting interference through other components so the only way to properly test would be to remove them(?). Q210, the middle one of the left, has all 4 inputs (5-8) soldered together so whatever comes in or out that side will be the same....

Re: LG 37LC2D No picture, believe bad power supply

Measurements for those are:

For the 3.4 converter on left side:
Top chip - Q209
0 0 0 0
11 11 11 11

Mid - Q210
0 0 0 0
0 0 0 0

Bottom - U204
2.9 2.9 17.5 0
0 11.3 0 0

6V Converter on the right side:
Left - U200
0 2.3 9.3 0
0 5.1 .9 0

Mid - Q204
5.2 3 3 3
1.2 0 0 0

Right - Q205
3.3 3.3 3.3 3.3
0 0 0 0

Hmmmmm, readings seem to be...

Re: LG 37LC2D No picture, believe bad power supply

Sure, see attached for the one I am referring to. I guess your comment verifies the fact that I can find some but not all parts references to the board. I have downloaded a few 37" manuals but this seems to be the closest match, but not enough help for me.

Page 56 in the upper left corner is the only info I can find. My D200 has 5V coming off the center pin, C202 was replaced with the cap set and shows 5.2, cannot find any other parts listed. When I try to trace the back of the board I think I see where all...

Re: LG 37LC2D No picture, believe bad power supply



My reference is "LG_37LC2D_LCD_TV_Service_Manual.pdf" from a link you posted awhile ago that points to "tgohome.com" I have found other LG37LC2D manuals but none with the UD suffix. Yours is the closest, but even with it there are some components that do not cross from diagram to board. I feel quite lost ...

Re: LG 37LC2D No picture, believe bad power supply



Here are pictures of the bottom PS board, all of the components look pretty good here. I downloaded the UD version power supply diagram but having a hard time deciphering it. Any additional help would be appreciated....

Re: LG 37LC2D No picture, believe bad power supply

Hi everyone,
Yet another 37LC2D issue. It's a one owner and stopped working a few days ago. I thought about parting it out, but after getting a new Toshiba LED unit at Best Buy I am not satisfied with the colors at a slight viewing angle and would like to get my old reliable LG working again.

Sure hope someone can help me locate the issue ......

TV is a model 37LC2D - UD
Power board is a - LGLP 2837 HEP

Measured the V on all the connectors while powered up, all the 6V outputs...