Re: One vertical green line on my AQUOS LC-70LE740E TV
Unfortunatly that did not work in may case. Thanks again for all the help. It was worth a shot and I gained quite a bit experience. Im gonna sell the TV as defective.
hoot
Member
Last Activity: 12-05-2021, 09:31 AM
Joined: 11-21-2021
Location: NY
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Thanks again, for all the information.
I will not heat the flex to pcb connection. I will heat the connection between the flex and the screen. If that won't fix it and the TV remains functional apart from the green line I will try to sell it for 100 bucks.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
What would a 70" 1080p made in japan TV with that defect go for in your country, roughly speaking.
Okay I can heat the contact between the flex and the screen. Should I heat the connection between flex and PCB first?Last edited by hoot; 12-02-2021, 05:49 PM.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Touch it on that surface?
I hope I can gift the TV to someone local. On local listings people are asking quite some money for TVs that are more damaged than mine. Is there still any value in a TV like this?...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Thank you very much, it was worth a shot and I gained alot of experience. What do you mean by "screen glueing"?Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Started with 230°C 1-2s on different points of the COF on the left and right flex next to the green line, went to 260°C, to 300°C, eventually to 370°C. The TV survived just fine the line however remained.
By playing around with the connection seen below, I can get a hole in the line. Disconnecting completly will turn the whole section white. Dont know if that is a useful clue. If there is nothing more to be done I will get rid of the TV.
...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
I now have tried with this one (no station directly into the powersocket) for 20s in the middel (5min heatup time):
...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Thats all it says. Judging by what your saying the iron did not get hot enough?...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Since I wasnt able to find my modern soldering station I have used this old timey heavy duty one:
Here I have three ribbons. The one at the bottom I have played around with quite a bit to get the feel for it. The middle I have applied 1-2s light touch in the middle as well as 2 points to the left and 2 points to the right. The top one is untouched. The deformation of the flex is due to me taping them onto epoxy:
Here I did apply 20s in the middle:
...Last edited by hoot; 11-27-2021, 11:04 AM.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
That's good to hear. I was just guessing.
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Ready for practice!...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
According to what I have researched the POC ribbon can take 230°c long time exposure and 400°c short time exposure. So the heat will most likey be an issue for the surrounding components before it damages the ribbon itself. I will get some ribbons from an old and broken monitor so I can practice a bit.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Got ya! First I'm preparing for the heating operation. If the TV survives without the issue being resolved, I will do that. Actually I could apply pressure to these points before I do that.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
That I will keep in mind. Do you suggest going with the soldering iron where the flex meets the screen?Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
I will apply heat (270-370°c) for 1-2s on the "1st" COF. If it does not work I will move on to the "2nd".
On each I will start in the middle and move outwards....Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Okay, I will focus on the COF closest to the green line and the one next to it.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Might be the next one. I will double check on both. If it is still worth a shot appling heat although pressure did not show any change I think I'll do it anyway.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Appling pressure to the COF next to the green line did not work.
...Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Very well. Im going to try to locate the spot by appling pressure. Then Im going to apply something between 270 and 370°c for around 0.5-2 seconds on that located spot. Wish me luck.Leave a comment:
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Re: One vertical green line on my AQUOS LC-70LE740E TV
Thank you very much, this is critical information.
So Im going to loosen the PCB put epoxy under the COF and put the pcb back to its place.
Then Im going to apply pressure with a toothpick on differrent spots on the area shown below.
After I have located the critical spot Im going to take a soldering iron and apply heat until the line disapears. What temperature do I set my soldering iron at?...Leave a comment:
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