ive got a LG 47" LCD TV 47LF66 which works perfectly for 2mins then the screen breaks up into vertical lines and goes blank except for a few pixels, also ive noticed the remote works when the screen is fine, when it starts to break up the remote doesnt respond, first thought it was the tcon but changed it and no difference. had a look at the powerboard and found a blown cap (25 680uf) so i replaced it and just to be on the safe side changed all the surrounding caps but still no difference, can anyone help please
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Re: LG 47" 47LF66 lines
Pictures of boards and overall layout -
Re: LG 47" 47LF66 lines
are the attached any help?Attached FilesComment
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Re: LG 47" 47LF66 lines
That'll be a Mainboard fault....TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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Re: LG 47" 47LF66 lines
im thinking the same, any likely faulty components? or would it be a replacement boardComment
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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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Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed... -
Hello all, I've been looking into this portable air conditioner's remote control and can't find what could be causing the problem - or possibly this remote is just terribly designed.
The remote only works at exactly 3V - if I drop it any lower, using my bench power supply, to say, 2.9V then the remote will not flash the display and turn off. I don't have any AAA batteries that are exactly 1.5V each so I'm not sure if this remote is designed this way - to only use the freshest possible batteries, or if there's a failed component in the mix.
I can't find any schematics... -
Hello everyone,
I was wondering if anyone could help my in pairing a remote with a Toshiba fire tv?
The Tv model number is: 50lf711u20 Rev B.
I've already replaced all the the circuit boards within the tv along with the I.R. sensor receiver.
I've tried 3 different remotes which should be fully compatible with this TV.
Oddly enough. A few if the buttons on all of the remotes actually work. Even without pairing...which makes no sense.
The power button, along with the volume,back,select, and directional... -
Hi all
I have lines on the screen...which is an age old problem that can be remedied by watching Youtube videos and getting out the tape.
My issue (after successfully fixing a different sammy tv with a separate tcon board and isolating the side of the panel...):
This tv has an integrated tcon...so it is a bit more confusing when trying to isolate the clocks.
It has a c ribbon and i have taken each end out to see if that will isolate the lines. instead, it makes it much worse ALL over the tv!
So....i don't know what end of the C ribbon to work with...
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