Here is a picture of the problem. Thanks!
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Re: Is this likely a panel problem, or something else?
Anyone? This is a 40 inch Panasonic plasma. I suspect the panel is shot, but just wanted another opinion. Thanks! -
Re: Is this likely a panel problem, or something else?
Just bumping this here. I don't know the model , because it was a set i was planning on buying with this problem. Anyone have any ideas? thanks!Comment
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Re: Is this likely a panel problem, or something else?
It is could be panel but it if is cheap, the boards are worth around $30 total, and it maybe a loose connector for that part of the panel.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Is this likely a panel problem, or something else?
It definitely looks like a panel issue. I wanna say it's a tab bond or a TCON issue, but I'm not sure.Comment
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Re: Is this likely a panel problem, or something else?
Tom: Only 30 total for all the boards? Hmm, based on experience with this 50 inch that I'm still fixing, it seems the boards are about 20-30 a piece.
I just thought that particular "rainbow/barcode" failure was indicative of either a board or a panel. It run the entire vertical length of the screen. However, doing research has yielded conflicting information. Also, it seems if the connector is failed at the panel joint, then it's not repairable.
I'm planning on paying $40 for the set.Comment
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Re: Is this likely a panel problem, or something else?
Just because the parts are marked at $20~30 each doesn't mean they're worth that much if you can't sell them, based on my experience at least.
It won't be a broken connection on that part of the panel but the COF IC on the ribbon could be fried, but the typical symptom of that is a few lit up lines in a black bar, or a few lit up lines on a working bar.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Is this likely a panel problem, or something else?
Well...
not sure what to do, but it sounds like it might be worth the gamble. I didn't even want to chance $40 if it was surely a panel problem.
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Re: Is this likely a panel problem, or something else?
I agree might be worth a gamble in a Panasonic Plasma fails usually I see either a white bar black bar or a bar with just one line in it for a couplelines that would be representing of a chip on film failure this looks more like a classic c board problem or possibly a problem with the logic board but I could be wrongDid I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
there's always one way to find out fairly quickly and that is to remove the aluminum heat sink screws disconnect the tab from the c board and visually look at the chip on the ribbon cable if it looks burned on one of the corners the panel shot. compare to the check that's on the same ribbon cable on the buffer that's workingDid I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
Looks like a bad signal ribbon connection.ASRock B550 PG Velocita
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Re: Is this likely a panel problem, or something else?
Well , I finally got this set, and started to take a look.
Without complete disassembly of set, I can only see part of the ribbon connections. Visibly (under bright light), I see no defects, but I guess there could be something else going on, or under the metal where it attaches to panel.
Upon disconnect, I get solid white strips, which I confirmed is "normal" by disconnected the next ribbon as well. It actually appears that "half" the connector on the very end is currently not working, as one half shows proper display.
What I'm trying to determine is if this is the buffer board, or actually a problem with that ribbon connection. It looks like there are two very thin chips actually embedded on that ribbon connection ... so I'm really not sure.Comment
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Re: Is this likely a panel problem, or something else?
Those are the chips you need to inspect. Look and see if ones burned out. You need to remove the 2 screws that hold the heat sync on the panel to see it.Did I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
freak: The ones on the ribbon? I can see them, and I removed the screws for the metal plate that's attached to the ribbon, but the ribbon is glued to those plates as well. Wasn't sure that trying to pull the plate and risk damage to the ribbon was worth anything? How do I "check" these chips?Comment
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Re: Is this likely a panel problem, or something else?
No don't pull the aluminum plate from the ribbon. That will damage the screen. just remove the metal plate from the panel disconnect the ribbon cable pull it down and look at the chips. Thrre are 2 to a ribbon. you should see them as soon as you look on the opposite side of the metal plate of the panel do not remove the metal plate from the ribbon you'll destroy itDid I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
if there's a ribbon problems or a chip problem on the ribbon you will see one chip on the last bank you're having a problem with that chip will look darker in one area compare it to the other chip on that same ribbonDid I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
I think I see a small dark spot on the trace off the bottom of the chip. Haven't hit it with a magnifier yet ... but really both chips look OK as far as coloring being the same.Comment
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Re: Is this likely a panel problem, or something else?
Ok thats what usually will happen. Can you post a pic of the two chips side by side?Did I leave the soldering iron on?Comment
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Re: Is this likely a panel problem, or something else?
Hello,
I've been away from this project for quite some time, so I'm not sure if freakaftr8 is still frequenting this forum.
I was about to take a picture of these chips , and find out what if any repair could be done. Here are two pictures as best I could get of the ribbon connector and chips. Thanks for any ideas!Attached FilesComment
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Re: Is this likely a panel problem, or something else?
One on the right looks discoloured, does this correspond to failure area? Is that just dirt - have you tried cleaning it off?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Good morning,
I have a problem with Lenovo T580, which after error code 0288 suggests a problem with the display. I checked the display and it works on another laptop. I replaced the display cable with a new one. I programmed another BIOS (downloaded from this forum) and I still have the problem of a dead display - there is an image via HDMI, and the system does not detect the built-in LCD at all. The problem appears to be hardware. What can I check to confirm or disprove this? I found many threads on the Internet related to this problem 0288, but without specific solutions. Please advise.... -
Hi, this has panel problem for certain (AUO panel), in the troubleshooting process, after pressing ON button i am with set making a short lamp of backlight with status light shortly white then green/yellow repeated, in this situation main board remain powered and also tcon with all their correct output voltages. I cant find in the service manual description of this state, can you brief me ? thanks
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Hello I have a tv with bad panel
Brand LG 49uj701v. At first screen wasnt working only sound with backlight was working welll. The I tried tape at the lvds and it works but I get have image with shadoe -
I had a the above tv qn55q60r that had a bad panel but everything else good. I had another panel here from un55nu6900 with bad leds and melted diffusers.
I put the nu6900 panel in and powered it up and it does work but there are lines vertical lines.
I was trying to change the panel type in the service menu but donβt see my exact panel. Anyway to fix this or someone have similar experience.
the clear picture is the panel type from the service menus on the nu6900. The other 1 is the panel type that was set for the q60r with the bad panel....01-13-2024, 01:57 PM -
I have a TCL 55P6US with sound and backlight but no picture. This model does not have a T-CON board, and the right (rear perspective) panel board is fed from the left panel board. I have not been able to induce any change by disconnecting the secondary panel board or the tape cut-off method on the primary board.
There are a bunch of voltages missing on the panel boards. I can't find any shorted caps of the panel boards, and all of the missing voltage rails read in the kiloohms, which leads me to suspect the issue may lie on the circuit board, rather than a short in the panel.
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