Hiya all!
First of all, let me preface this post that I am fairly knowledgeable with a good deal of electronic repair and it has been geared at primarily vintage audio repair and I have a great deal of test equipment to my avail but, I am limited to the repair of LCD televisions aside from the "basic" concept and operation contained within.
With that out of the way...
I have a question regarding the repair of my LG 47" LCD that maybe you can help with. I get no pic and no sound. From the get-go, the standby LED is on as it should be then it flashes several times (approx 8 seconds) when switched "ON" and the blue (on) LED is illuminated but it is very, very faint. When it transitions from standby to on, the backlighting will "flash" and that's it. There is no backlight visible in a dark environment. I have read numerous ramblings about the usual maladies associated with the power supplies on these sets so that is what I first tackled. All of the voltages outputting from the power supply is good. The 24VDC, 16VDC, 12 & 5VDC are all good when being measured at the respective pinouts on the power supply board with all cabling attached. The green SMD status LED on the back of the main board flashes for a few seconds when starting up and remains on when it boots up. The illumination inside of the Opt-Vid port is visible as well. I still can power up the set with the remote so the comm. is still working. I checked for an image with the "flashlight" test but to no avail.
Before I start to throw parts at this dinosaur I am hoping that you more knowledgeable folks can give me a few pointers.
This TV is an LG 47LG50-UA
Thanx in advance for the help!
Bud
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