70JUDGE
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Apr 1, 2008, 8:44 AM
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Sharp LC-45D40U Won't Power On! Need Help!
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I have a Sharp LC-45D40U LCD TV,and when you plug it in,you can hear a click,and the power light flashes green for a second.When you unplug it,you can hear the click again.That's all it does.No picture,or even a hint of one.I have tested all of the capacitors on the mainboard with an ESR meter,and they all seem alright.The power button board seems to tests alright as well.Nothing looks burned,or broken.The clicking noise I found is two relays on the mainboard,so it is getting power,but maybe not enough,or they are not supose to click when you plug,or unplug the TV,just when you turn it on,and off?The only things I noticed that might be bad is the two surface mount capacitors on the remote sensor board measure high.I tried a different remote sensor board,but that didn't make any difference,and the two surface mount capacitors measured the same as the old board.Now either they are supose to measure that high,or I might have received a bad board.Can this TV still turn on without the remote sensor board plugged in?Also,what does the line filter board do?I'm getting 120V on the wires that go from this to the mainboard.Am I supose to get more?Any help is greatly appreciated.Thank You very much!
Tyler
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