Tv loses video backlight stays on replaced TCon same thing Rd in board drops. 8.8v and the video along with it. Anybody seen this ?
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Re: XBR65HX950 no video after 1 min
What happen to the Voltages on various test points on the T-CON if no ribbon cable between the T-con and the LCD panel connected?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: XBR65HX950 no video after 1 min
I have narrowed this down to something on the panal even though the picture is perfect Ill update you when I get a chance going on the road nowComment
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Re: XBR65HX950 no video after 1 min
It can be as simple as shorted/leaky caps on the tab bonding board, worst case will be bad COF.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: XBR65HX950 no video after 1 min
Ok so here is the update. I Found a 12 v source on the tcon that apears to feed the pwm for the 17v source and the 8.8 v source. This is the source that was dropping I fed an external 12v to it and the picture popped back on but I slowly watched the current rise from. 1/2 amp to 1 amp then the tv shut down and rebooted .. So I thought about what you said and I narrowed it down it is the panel or more likely some cap on panel board. I'll be taking that apart next. .. but I determined that one ribbon of the 4 would cause the shutdown. Disconnecting. It the tv would stay onAttached FilesComment
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Re: XBR65HX950 no video after 1 min
I don't think it's a COF I have a perfect picture!Comment
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Last edited by budm; 06-01-2019, 09:26 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: XBR65HX950 no video after 1 min
which one of the 4 tcon to panel cables are you "successful" with in getting the "non-shut down".
Further, if this set has tabs and edge boards along the side also, you can further isolate your problem by disconnecting the small corner cables that interconnect the bottom edge board to the side edge board. IF not, you can also try isolating by disconnecting the "U" ribbon cable that sometimes exists on "very long" bottom edge boards to interconnect those. These actions might help you isolate where / which area you need to focus your checks.Comment
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Re: XBR65HX950 no video after 1 min
It's the large on the picture on the right or the third one if you count left to rightComment
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Re: XBR65HX950 no video after 1 min
OK... I think that points to a problem in the bottom edge board... possible a smd capacitor or resistor.Comment
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Hi There,
This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.
After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.
More Details
TV Model - LG OLED77G1PUA
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Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side... -
This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
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