Re: Sony KDL-46NX720 4 Blink error (with pictures)
Is there a way I can text the voltage going out to the led strips on the LD board?...
Bigredram87
Senior Member
Last Activity: 06-02-2018, 08:38 PM
Joined: 09-14-2013
Location: Parma, ohio
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Re: Sony KDL-46NX720 4 Blink error (with pictures)
Ok what am I looking for do I take apart the screen and actually check individual leds to see if they are illuminated and replace individual leds?Leave a comment:
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Re: Sony KDL-46NX720 4 Blink error (with pictures)
Budm where are you taking this measurement ?...Leave a comment:
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Re: Sony KDL-46NX720 4 Blink error (with pictures)
Sorry to resurrect an old thread but I am having similar issues with the same set and wanted some advice. I get 4 blinks after the screen starts up. I checked the test points on the LD board and they all seem to start at 2.84V at boot than drop to .040 second later .025 than they fail at .384volts. My screen does look funky and wondering if this is the led if so are several of them bad ?
[URL="https://youtu.be/c8pnzhLCvgg"]https://youtu.be/c8pnzhLCvgg[/URL]
Here is my meter at LD test points...Last edited by Bigredram87; 05-29-2018, 03:44 PM.Leave a comment:
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Re: Lg 42ld550
Ok wanted to update after researching for a few weeks I learned that the main board was correct by contacting lg. I finally found one on eBay and just replaced it. Works perfect! Thank you guys for all the help. If any one wants the old board just for some diagnosing i would be glad to send it to you just pay real shipping cost. Thanks again guysLeave a comment:
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Re: Lg 42ld550
So I just talked to the guy he said he took it to a tv shop. The charges him 50 to look at it. Than they said it needed a new main board and quoted him another 250 to fix it so he didn't. What do you think should I just buy a main board with the tv model numberLeave a comment:
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Re: Lg 42ld550
I do not know about what has been replaced. All I know is when I took it apart the 2 ribbon cables were disconnected. So I don't know what was messed with.
This is what it changes to if I press menu [ATTACH]75652[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
1 more number sorry I dont know hwich one is model. This one is on the little LG coax ebl6072041Leave a comment:
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Re: Lg 42ld550
ok yes 2 numbers
eax61746403(0)
LGE2-EBU60852902Leave a comment:
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Re: Lg 42ld550
Im starting to think this main board is also the tcon board? someone please verify. I also have taken pictures of the front and the back of this main board. I have searched it pretty good and I cant find any component labeled F for fuse.[ATTACH]75640[/ATTACH]
[ATTACH]75641[/ATTACH]Re: Lg 42ld550
Im starting to think this main board is also the tcon board? someone please verify. I also have taken pictures of the front and the back of this main board. I have searched it pretty good and I cant find any component labeled F for fuse.[ATTACH]75640[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
My big question is are the 2 small boards on the top of the tv tcon boards? If not what are they? And if not is the Tcon under the metal shroudLeave a comment:
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Re: Lg 42ld550
Both removed[ATTACH]75629[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
The other [ATTACH]75628[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
1 ribbon cable disconnected [ATTACH]75627[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
Ok I am familiar with surface mount parts but from looking at other posts I can't figure out which one is my tcon board?some posts say its behind the metal? Or is it the 2 small boards at the top
[ATTACH]75626[/ATTACH]...Leave a comment:
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Re: Lg 42ld550
Ok with both ribbon cables unplugged the screen does just glow. Please advise on next stepLeave a comment:
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Re: Lg 42ld550
If the screen is black with a slight glow does that mean the lcd panel is good? ThanksLeave a comment:
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Re: Lg 42ld550
So i am going to go do this test in about an hour when I get home, but Im curious what results are you expecting and/or what would a few different results mean? Or even what would a correctly working TV do with unplugging a ribbon cable?Leave a comment:
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Re: Lg 42ld550
Ok I will try this as soon as I get home from work.Leave a comment:
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Re: Lg 42ld550
[attach]75575[/attach]
[attach]75576[/attach]Re: Lg 42ld550
[attach]75575[/attach]
[attach]75576[/attach]...Leave a comment:
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