Hello all, there is a Lg CT-21D31KE tv i am working on presently, it shows some green, blue and red cvertical lines only no other picture. but it produces sound. Can any give me any suggestin?
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Re: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
CRT? It sounds like the beams are not converged and you have no horizontal drive. Could be bad caps I have heard of this with other CRTs.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. -
Re: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
Thanks Tom, apart from caps, can any other cmpnent cause it, like the line transfomer?Comment
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Re: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
I don't know much about CRTs (never repaired one), but I don't think it could,. Can you show a picture of the fault?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: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
That is it Tom.Attached FilesComment
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Re: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
To me, that looks more like FOCUS voltage is bad, which can be LOPT or FOCUS divider. Try adjusting FOCUS to see if picture changes, if it does then the FOCUS divider may be OK and it is the LOPT at fault due to low FOCUS voltage.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: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
I have adjusted the focus and the picture changes but i don't no what's LOPT can you please explain? Thanks.Comment
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Re: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
LOPT same as line transformer / flyback.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: LG CT-21D31KE Tv, showing green, blue and red vertical lines but sound is ok.
Ok. Thanks for the explanation, i have tested all voltages and they are all ok. I think i should replace the LOPT then.Comment
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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... -
Hi
Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.
Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.
The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.
I have already tried replacing all of the... -
Samsung UE75MU7009TXZG Endless Power Cycle
Hi everyone and thanks in advance for any help I might get here
My Samsung TV is about 4 years old. The exact model number is UE75MU7009TXZG.
About half a year ago I started seeing occasional green frames pop up while watching movies. I mean literally green frames. Not the image turning green, but the entire screen turning green for a split second. This happened maybe once or twice during a 2 hour movie. So no big deal, but clearly something was not quite right.
Since a few days, the TV won't turn... -
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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Good day ladies and gentleman!
I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.
This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).
I think the PSU buzzing comes from one of the coils near the bridge rectifier but...
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