Re: LG 50PV400 black vertical lines and twin sections
I tried the other ribbon cable. No change - looks the same as before. The thing I keep coming back to, that helps me to believe it's not the panel (even though it probably is), is that it is *exactly* 1/3 of the screen that is affected. Doesn't that seem a bit strange for a panel fault? Obviously I'm very new at this so maybe that is normal but it sure seems odd to me.
I don't even know what else to check for at this point though. Tom, thanks for all your help. You're a gentleman and a scholar!
ponchorage
Member
Last Activity: 02-03-2015, 09:15 AM
Joined: 12-30-2014
Location: Spanish Fork, UT
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Re: LG 50PV400 black vertical lines and twin sections
New control board didn't fix it.
The only thing (besides the panel) that I can even think might be the problem at this point is the ribbon cable between the control board and the XL board. Can I use the ribbon cable from the XR board (it's the only one long enough) to test between the control board and the XL board? The ribbon cable between the control board and the XL board is marked "ES1124" while the one between the control board and the XR card is marked "ES1130".
Even if switching these...Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Still waiting for my new control board. Thanks tom66 for all the help!
I do have a few of questions though. How exactly does the self test work on the control board? I mean, in my situation, I did the test and I do see the cycling patterns but I also still see the defect (the large black vertical line). What exactly does this mean? Does this mean my main board is good and that the problem is further down the line? What does this test check for?
Also, I could see a flashing green light on the control...Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Found a control board for $10 on eBay. Worth a try. Feel like I'm shooting in the dark.
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Re: LG 50PV400 black vertical lines and twin sections
The test patterns come up just fine when I use the jumper. I just happen to also still see the black vertical lines. Are you thinking I shouldn't see those while using the jumper?
My outcome so far is the same as when I started - seeing the black vertical lines.
I'm tempted to order the control board if there is any possibility that it is the cause of the problem.
Is there not a more systematic way to eliminate components as being the problem with these LG sets? I've seen...Last edited by ponchorage; 01-08-2015, 11:25 AM.Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
So, I replaced the board and I still have the same issue. Is it possible that the control board is bad or is it the panel for sure now?Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
OK, so looking at the TV from the front (viewing the screen), it is the right side that has the problem. So, I should replace the board on the left side, looking at it from the back, correct?Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Yeah, it's only like $30 for those on eBay so I'll probably give it a shot if you think it's still a possibility it could be those boards. Thanks again for all your help tom66!Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
I tried it without the jumper and didn't get the cycling test so I assume that worked. Could there still be a problem with another component?Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Only if it was jumpered correctly would it do the cycling test, right? So does this mean the panel is bad or do I need to check something else?Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
I got the cycling test patterns. That area of the screen was still dead.Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Please forgive my ignorance as I've never done anything like this before. Would it be ok to just use a short length of copper electrical wire for this? I don't need to solder anything since this is temporary, right?Leave a comment:
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Re: LG 50PV400 black vertical lines and twin sections
Here is the photo of the control board. Looks like somebody had already removed the tape over one of the ribbon cables. Thanks for your help!...Last edited by ponchorage; 01-04-2015, 11:06 AM.Leave a comment:
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LG 50PV400 black vertical lines and twin sections
I just picked up this set for my first attempt at TV repair. The guy I bought it from said he thought one of the x boards needed to be replaced. It's got a several inch section of black vertical lines with a couple of gray lines interspersed that start at the bottom but don't go all the way up and they flicker. To the right of that, and this is strange, there are dual vertical sections. It's like a small slice of the screen gets repeated. The pictures I've attached will explain it better than I have.
From my research it seems it could be a bad tape carrier package but I'm really... -
Re: New Members - please post your introductions here
Hello! I've decided to get into TV repair as a hobby and have already found good information here. I do software development for my day job and have always wanted to dabble a little more with hardware.Leave a comment:
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