I'm looking at this annoying 50" RCA LCD and am having a bit of trouble figuring out what's causing it problems. What happens is that when it's plugged in, I can power it up, but it shuts itself off immediately afterward. Once this happens, the whole thing completely shuts down and will not even let me try to power it up again unless power is cut and then reapplied.
I know there are at least three other threads on this, but I wanted to start fresh because not only did the problem not get solved in any one of them, but different conclusions were reached each time.
The only thing I've tried so far is replacing the mainboard with one purchased on eBay, since this is what the cause of the problem was for one other individual on the forum who was experiencing the exact same issue with his set. I'm not 100% convinced that the mainboard I purchased was good, but as always, the odds of two bad mainboards in a row are quite low, so I'm naturally skeptical.
Since the troubleshooting processes always inevitably tend to lead there, I guess I'll get it out of the way now: Is there any way to test the backlight system in this on a basic level without tearing its 50" panel apart? I'll attach some pictures of the topology for this set and the power supply board (borrowed from another thread because I forgot to take pictures when I was inside of it, but it is the same).
I know there are at least three other threads on this, but I wanted to start fresh because not only did the problem not get solved in any one of them, but different conclusions were reached each time.
The only thing I've tried so far is replacing the mainboard with one purchased on eBay, since this is what the cause of the problem was for one other individual on the forum who was experiencing the exact same issue with his set. I'm not 100% convinced that the mainboard I purchased was good, but as always, the odds of two bad mainboards in a row are quite low, so I'm naturally skeptical.
Since the troubleshooting processes always inevitably tend to lead there, I guess I'll get it out of the way now: Is there any way to test the backlight system in this on a basic level without tearing its 50" panel apart? I'll attach some pictures of the topology for this set and the power supply board (borrowed from another thread because I forgot to take pictures when I was inside of it, but it is the same).
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