Re: Samsung UE55JU6875 issue after backlight replacement
yes exacly. I had the LVDS cable in place but cables from T-con to panel was ofcourse not connected to the panel since the panel was removed. My thinking was that those cables could have toutched the metal frame and been grounded during the test and caused some damage to the Tcon card.
I have found one fuse which was ok but will remove the metal shield as well.
I have tried to only have the left and the right cables from the Tcon attached without getting any trace of a picture anyway, that was the...
nicke74
Member
Last Activity: 04-19-2023, 08:18 AM
Joined: 03-16-2023
Location: Spånga
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Samsung UE55JU6875 issue after backlight replacement
Got problem with a samsung UE55JU6875 after replacemant of backlight
I have done similar replacement several times before without any issues but now I got video problems after the replacement and do not understand why
Attached picture of the problem
Is it a bad panel or any issues with the T-con card or ribbon cables or bad connections?.
I have tried to replace both ribbon cables from T-con to panel without any difference.
Any ideas?
The only misstake I might have done was forgot to remove the ribbon cables from the T-con card before...Last edited by nicke74; 04-02-2023, 11:44 AM. -
Re: Tab Bond repair Philips TV
Thanks . I will order the stuff and will ofcourse update in a few weeks when the delivery has arrived
Do I need to completly have to disconnect the the damaged cable, or will it be enought/possible disconnect on the "broken" side, clean, add tape , and heat under presssure ?Leave a comment:
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Re: Tab Bond repair Philips TV
Sorry. I didnt menat you should recommend any seller.
More for me to understand the difference since I found different marking of the tape
Some examples
New Date ACF AC-7206U-18 TAPE
New Date ACF AC-7246LU-18 TAPE
New Date ACF AC-4713SY-18 TAPE
etc
For the head I found something like this which cost just i few €.
2pcs/Set Soldering Iron T Tip T-head,Copper T-Tips + Rubber Cable Hot Press For LCD Screen Pixel Flex Cable Repair 30W 60W 40W
...Leave a comment:
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Re: Tab Bond repair Philips TV
Hello, thanks.
Since I never have one this, could you maybe link to aliexpress which product I need.
I suppose I will then find some guides at youttube exacty how to perform the job..
If I understodd correctly I need this rubber head for my solidering iron and this special tape. I guess the hardest part will be to attached it on exactly the correct position.
Sorry for maybe stupid questions
I tried to search in the forum but didnt find any good post to ready about this..Leave a comment:
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Tab Bond repair Philips TV
Hello guys
I have a philips TV where we accidently managed to damange one of the tab bond from the panel.
Maybe not the best picture but one part of the ribbon have come loose.
As far as I understand those ribbons are attached with special glue but since the majority of the ribbon still is attached I wonder if it is possible to solve the issue by myself or shoufl I judge this as a scrapped panel.
The TV is only 4 year old and I was fixing another problem in the TV when I accidently damanage this connection.
When reading the forum I think some guys have... -
Re: LG OLED 55b7v No video
slightly but I do not think I manage on this level..
Do you know anyone which have the knowledge...Leave a comment:
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Re: LG OLED 55b7v No video
Hmm, I have performed some measurments . It does not seem to be any shortcut to ground , atleast nothing I found but still no 5V power on the board
I have verified bot 12v and 20 v incoming on the board.
Anymore advise what to check or do I need a new mothercard?Leave a comment:
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Re: LG OLED 55b7v No video
atleast it respond to power on / off via the remote.
Hmm sorry Im a real rookie when it come to TV repair. Could you advise me what I need.
I have some old mobiles which I think support IR, Can I download an app doing the trick
Sorry for my beginner questionsLeave a comment:
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Re: LG OLED 55b7v No video
I can add that the panel was replaced by LG due to burnt in issues just two year ago so it is a quite new panel. Ofcourse it could be broken .
Now I also tried to disconnect all cables between the T-con board and my mainboard and still no power to usb or optical output..
Is t possible to reset the main board sw in some way incase it went into some bad state?Leave a comment:
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Re: LG OLED 55b7v No video
When looping the 3,5 V from pwr_on to drv_on I got 24V from the powerboard so quite sure the powerboard is ok.
I noticed that I do nt have any power to the Optimal output or the USB connectors and no power to the standby led either so I suppose the issue is related to a bad main board.
Or could the T-con board be involved anyway in the problem?Leave a comment:
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Re: LG OLED 55b7v No video
Hmm, I erformed som measurements on the board but do not know what the correct values should be and if it concludes anything related to the problem.
In operating mode:
DPC = 0V
ACD = 3,5 V
PWR _ON = 3,5 V
12 VM = 12 V
20 VS = 20 V
DRV_on = 0,07 V
In standby
DPC = 0V
ACD = 0 V
PWR _ON = 0 V
12 VM = 7,6 V
20 VS = 0 V
DRV_on = 0 V
My feeling is that the problem is related to the DRV_on signal which does not turn on the 24 V.
...Leave a comment:
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Re: LG OLED 55b7v No video
No differnce when disconecting the 24 V from the Tcon card
I acctually noticed also that Im only able to turn off the panel via the remote about 30 secound after I started the TV.
When I wait longer nothing happend and the TV remains turned on. I also notice tat the standby LED does not light anymore
I suppose I need to meaurse the input to the main board again to verify input
I suppose this is a indication of problem in the main boardLeave a comment:
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LG OLED 55b7v No video
Hello all
My first post here.
I have a LG OLED 55b7v which suddenly getting problem with no video.
I have opend the TV up and found that the 24 v is missing on the output from the Power board.
I have seen alot of posts related to similar problems but my Tv seems to behaves a little bit different
I can turn the TV on via the remote and the TV starts to consume about 55 W but nothing happend. I can also turn it off via the remote via the remote.
The Tv stays on when I turn it on. I cant see any red light from the optical output.... -
Re: New Members - please post your introductions here
hello
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Re: New Members - please post your introductions here
Hello all. Im from SwedenLeave a comment:
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