Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

I couldn't find a video on how to do this and since we have always tested lower caps out of circuit we wouldn't know where to begin with that. We are not quite to that level of board repair yet. but were smart enough to know not to do it unless we know exactly how lol. My brother thinks it might be one of the transformers that could be bad because before we replaced all the regular caps it was chirping. T101 on the schematic But we've never tested one of those either. If you have any reference videos or webpages...

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

I think you got a bit ahead of us lol. I am not quite sure which two caps you are talking about

Here is the schematic for the board:
[url]https://drive.google.com/file/d/0B33b1mXkw_NnckswcTBieXpEX0k/view[/url]

Can you please tell me the # on the schematic next to the caps you want me to test?Re: LG 42LC7D-UB Comes on backlight ... <br /> <br />

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

Well it was not the Ballast (blue) caps on the inverter side of the board. . I guess the only thing left to do is buy another board since I know this is a Power board issue since switching out the board from another tv worked. Unless you have any other Ideas on this?

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

OK gonna buy the Ballast Caps near the connectors for the ccfl lamps. I Should be posting within the next week letting people know if that solves it or not. I hate when so many people ask questions and then someone solves it but they don't post back to whether or not it worked.

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

It's not a tube because I tested this TV with another board from the same model # and it worked fine so I know its something on this board. Just not sure what. We tested the 22k 6v Ballast caps (blue) By the connectors to the CCFL lamps. They seemed good. This morning we re did the joints on the HV Transformer. Just in case cause someone on another board about this issue with tv's said that was his issue. Really lost now as where to go next.

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

we replaced the 11 caps marked in red in this image and tested the rest and they test as good.

[url]https://drive.google.com/file/d/0B33b1mXkw_NnSk41UHR3X0FXbTQ/view[/url]Re: LG 42LC7D-UB Comes on backlight ...bTQ/view[/url]

Re: LG 42LC7D-UB Comes on backlight flashes 3 times and TV shut off

I also have this issue on a 42l7d-ub. Originally this unit would not turn on so we replaced the caps that were reading as bad. Now it turns on and the back light comes on as does the channel in the corner and the sound but then the back lights go on and off 3 times and it shuts down. We know this is a board issue because we had another LC7d TV that just had bad caps and we fixed that board got it working put it in this unit and it fired right up. Still looking for answers

Re: New Members - please post your introductions here

I'm new here. My brother and I have just started fixing bad caps on tv's we used to do them on motherboards when they went bad. Now just looking for some other information.