My newest project, an LG 47LC7DF, look what I found.

[lookimback]

The problem is bad caps on the power supply and I suspected that before I got the TV. Its a common problem with this model. When I opened it up, I found that it had been worked on before and a couple caps had been replaced with what looks like Radio Shack caps.

I'll be replacing the 9 caps which I marked with the red dots in the first pic. 5 of them are 10v 2200uf but I think its common practice on this model to upgrade them to 25v 2200uf. That's what I'll be doing.

[multimeter]

Re: My newest project, an LG 47LC7DF, look what I found.

and those 5 caps you mention,have been fails on this psu for me also,uprate 2200uf10v,to 25v,you can be sure by checking dc voltage across those caps on board,they rate them too low

[multimeter]

Re: My newest project, an LG 47LC7DF, look what I found.

and that axial leaded cap leg looks awful close to the standby transformer!

[lookimback]

Re: My newest project, an LG 47LC7DF, look what I found.

Those are the Radio Shack ones. They're coming out and being replaced with radials. And I had suspected that those caps should be uprated. I hadn't found anything specifically saying it, but had noticed it being done in a couple YouTube videos.

[tom66]

Re: My newest project, an LG 47LC7DF, look what I found.

They don't need uprating. LG used 10V capacitors on the 5V and 6V rails, and 16V capacitors on the 12V rail - which is sufficient.
The originals were just shit caps (Samwha WB, Samwha XC.)

[lookimback]

Re: My newest project, an LG 47LC7DF, look what I found.

I'll go with the same as the originals then. Thanks Tom.

[lookimback]

Re: My newest project, an LG 47LC7DF, look what I found.

So I could actually put a meter across the caps and determine, based on the voltage, whether the caps are sufficiently rated. I've learned something here. Thanks.

[tom66]

Re: My newest project, an LG 47LC7DF, look what I found.

You could also trace the SMPS output and see which labels correspond to what pins.

[lookimback]

Re: My newest project, an LG 47LC7DF, look what I found.

OK, that makes sense.

[lookimback]

Re: My newest project, an LG 47LC7DF, look what I found.

I replaced those 9 caps and it's fixed. I've decided I'm keeping this one for myself and selling my 40" Sony Bravia that I've been using since I fixed it in mid September last year. Here's a pic of the repair. Looks much better now. Thanks again to everyone who helped.