Hi I picked this up on the side of the road. It has black horizontal lines on the display. It's it repairable?
I looked for bulging caps but didn't see any.
Thanks
I looked for bulging caps but didn't see any.
Thanks
Attached Files
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Re: Insignia plasma n2-42p650a11 black horizontal lines
I tried to reseat the connecters but it made no difference. -
Re: Insignia plasma n2-42p650a11 black horizontal lines
Test the Y-buffer output pins to the panel, they cannot be open nor shorted, where there's these lines, if it's a buffer fault, they would be open, infinite resistance.
Put multimeter in diode mode, the positive probe on the buffer's floating ground, negative on the output pins, should have a forward voltage of 0.7~1.2V.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
I went across all the pins and they all show around .739v.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
If there's .739V on the same pins as these horizontal lines, I say it's a panel problem.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
Yeah I double checked them so that makes sense. Thanks for the help.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
It may be woth your while to search the forum on how to do a self testWilling to help but I'm no expert.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
That's a Ybuffer problem. If you can get a working set cheap replace them. Or replace the buffer ic's responsible for those portions of the screen.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
It certainly does look like a Y buffer problem. I would repeat the buffer testing.
https://www.youtube.com/watch?v=V6hxf9sARMYWilling to help but I'm no expert.Comment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
Yeah my board looks just like that. I did that test a bunch of times and didn't get any shorts which seems strange.
It looks like a replacement board cost more than the TV is worth so will prob just trash it.Attached FilesComment
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Re: Insignia plasma n2-42p650a11 black horizontal lines
Actually There are some used ones (untested) on ebay for $20 or a "new" one for around $35. Do you think it's worth the gamble to see if it fixes it?Comment
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First, the black horizontal lines even overlay the TV's menu. Does this behavior indicate that it's the plasma panel that's defective? If not for the black lines, the TV works just fine. I've cleaned the 6 connectors between the panel and the Y-buffer board, causing no change in the black lines. Visually, the 12 ICs on the Y-buffer look brand new (no holes, etc.). I put my fluke meter in continuity mode and tried to perform the "short" test on the 6 panel ports and found many shorts. But I don't think I'm doing the "short" test correctly and I'm hoping someone can provide guidance.... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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hi guy my friend gives me this tv a 50tu8070u that has no picture at all, sound ok, backlights ok. i tought it was a bad panel, but the tv has many horizzontal lines green, i tried with the tape method but nothing change, only the green lines disappear but still no picture. You that have more good than me, do you think it s a panel or can be the main board, because my friend wants buy a new main board....but the tv respond to the remote control, have sound only no picture so i think it s a panel problem that is so broken that i cant fix with tape...or i wrong if someone can help me thanks, i give... -
Hello Everyone
I need your help to repair my poor Samsung TV which decided not to let me watch my favorites series in the afternoon. Suddenly black horizontal lines appeared on the screen making my life a hell
Photo:
https://ibb.co/Kyhm9M5
Close up photo:
https://ibb.co/zNtv4XP
I have seen many youtube videos with guys who put a tape in ribbon cable and TV fixed in a magic way (I have tried without success).
My TV model is: LE46C750R2W
Photo:
https://ibb.co/Q6RFN94
I have tried to disconnect one... -
good morning! I have a problem with this Sony. The image has a pattern of black horizontal lines, I attach a photo of the lines. The power supply is external and emits a sound. I don't think it's because of that. Let's see if someone can help me.
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