I've been working through an issue with my 42"LG. The initial symptom was that I had lost the picture but still had sound. I jumped on this forum and with some searching it looked like a Y or ZSUS board issue. I found an open fuse on the YSUS board but all looked good on the ZSUS. My other observation was that I got a sag in Vs (168Vdc) just before shutdown. I checked the power supply outputs and all were spot on otherwise. I sent the suspect board to Coppell for repair, but after re installation the same symptom remained. At this point I ordered a ZSUS board from Coppell and a buffer board. So long story short after installing these components still have the same issue. So now I'm looking at the control board and have made a few observations. First, if I disconnect the input to the control board the set will remain on with a white screen and a normal Vs of 186Vdc (per sticker on chassis). Also I noticed that there are four LEDS marked D12 through 15. All are solid green except D15 which is not lit. Is this normal or am I looking at a bad board. Any input from you guys would be appreciated. Warren
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Re: LG 42PC3D control board issue
Anyone have experience with this issue in particular normal state of LED's D11-15 on the control board? Thanks, Warren -
Re: LG 42PC3D control board issue
Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problemComment
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Re: LG 42PC3D control board issue
Will do. ThanksComment
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