Re: Lg 47lw5400
sounds kinda like mainboard or panel to me, but again I am not too good at diagnosing. I have sort of the same symptoms. I had a black screen, but did get the blue power light. I replaced the mainboard and got some display, but I think the mainboard I got was defective and shipped it back. Now I think I am going to give up and try and get what I can out of it.
ludespeedny
Member
Last Activity: 11-02-2015, 07:19 PM
Joined: 11-25-2013
Location: Grandview
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Re: Lg 47lw5400
What are your symptoms?Leave a comment:
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Re: Lg 47lw5400
Does yours work properly?...Leave a comment:
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Re: Lg 47lw5400
3v on the pwr-on pin.
Thanks!Leave a comment:
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Re: Lg 47lw5400
Also when testing the power board again I get normal voltages except for the power-on 24v in this pic: [url]https://picasaweb.google.com/lh/photo/VmVswZz0L10RV7Y8SjSISKql0LkuHsDIW8oA8xrHpxY?feat=directlink[/url]
I only get 3v what is this and is this my issue?Re: Lg 47lw5400<br /> <br /> Also ...this my issue?Re: LgLeave a comment:
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Re: Lg 47lw5400
So just got a replacement t-con board today and same results. Is it possible the mainboard I got was bad?Leave a comment:
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Re: Lg 47lw5400
Is it possible a bad t-con would prevent the tv from fully booting?Leave a comment:
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Re: Lg 47lw5400
So I got a mainboard and partial success. It will power on but has these lines on the tv, and never fully boots, it stays steady for a bit, then flashes and eventually will power off. Any suggestions?
[url]https://picasaweb.google.com/lh/photo/oimxNvHB5riPpEFQoKn4o6ql0LkuHsDIW8oA8xrHpxY?feat=directlink[/url]Re: Lg 47lw5400<br /> <br /> So I ...url]https://piLeave a comment:
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Re: Lg 47lw5400
Here is a pic of the back: [url]https://picasaweb.google.com/lh/photo/5_IIu6_dbYDAvHV1mzs4J6ql0LkuHsDIW8oA8xrHpxY?feat=directlink[/url]
I think the led's are actually built in the screen but not sure.Re: Lg 47lw5400<br /> <br /> Here ... but not sure.Re: Lg 47lw5400
Here is a pic of the back: [url]https://picasaweb.google.com/lh/photo/5_IIu6_dbYDAvHV1mzs4J6ql0LkuHsDIW8oA8xrHpxY?feat=directlink[/url]Leave a comment:
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Re: Lg 47lw5400
Yeah, I have no display so not sure how to tell if online.
Ribbon connectors look fine.
So to see if they get voltage, I should put the positive on the B+ and negative on any ground?Leave a comment:
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Re: Lg 47lw5400
I tested the voltages on this board: [url]https://picasaweb.google.com/lh/photo/VmVswZz0L10RV7Y8SjSISKql0LkuHsDIW8oA8xrHpxY?feat=directlink[/url]
and most were close enough to spec. The 12v were about 11.9 the 3.5v were about 3.45 and the 24v was about 24.4. So it would seem like the power board is ok.
What do I check next?Re: Lg 47lw5400<br /> <br /> I tes.... The 12v wereLeave a comment:
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Re: Lg 47lw5400
How can I test the fuses on the power board? I tried and didn't get anything on them , so maybe I am doing it wrong, what should I set the multimeter to and what should I expect back?Leave a comment:
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Re: Lg 47lw5400
Ok, looks like there is nothing on the screen and doesn't seem that the audio works either. I tried playing a Blu-ray and switching inputs but got nothing. Also, the backlight doesn't work on powerup either.Leave a comment:
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Re: Lg 47lw5400
Do you know if that is the case if I can replace components on the board or just buy a new board?Leave a comment:
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Re: Lg 47lw5400
Ok, I'll try that tonightLeave a comment:
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Re: Lg 47lw5400
Sorry meant it is the 47lw5300Leave a comment:
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Lg 47lw5400
I recently acquired a LG 47lw5400 that screen doesn't power on. When I power it on the power light goes from red to blue, but I don't get a display. I checked the power board for bad caps, but all appear to be fine. Could someone recommend the next steps to take to figure out if it is the main board that needs replacing or the t-con board?
Here are pics of the mainboard and power board (sorry, I didn't get any of the t-con board yet).
[url]https://picasaweb.google.com/102366083717450362254/LGTv?authuser=0&authkey=Gv1sRgCIS03dm7_IbPXg&feat=directlink[/url]I recently... -
Re: LG 32LX1D will not turn on
How can I find the specs for the parts on the power board? Not sure how to identify them for replacement. The tv is a 32LX1D-UALeave a comment:
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Re: LG 32LX1D will not turn on
Yeah, the measured voltage across the wires on each capacitor Small holds 12v, then rapidly falls off. Large remains constant at less than .3v.Leave a comment:
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Re: LG 32LX1D will not turn on
Sorry wrong pic, should be this:...Leave a comment:
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