I have an LG LCD Tv that has a picture problem. The picture is very bright white, possibly a contrast problem. Would the T-CON be responsible for this or the main board? See pic of screen below.
Attached Files
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Re: LG LCD 47LM5850 Contrast/Picture very white
Looks like bad GAMMA ref Voltages on the T-CON. Pictures of the T-CON BOARD?.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 -
Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Hi guys. I replaced the TCON board and no change, screen is still the same.
What else could cause this? A bad LVDS or main board? A bad panel??Comment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Check the GAMMA DCV on the GAMMA Voltage test points of the old board and the new board.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: LG LCD 47LM5850 Contrast/Picture very white
ok how do I go about this. I don't see anything on the TCON that says gamma.Comment
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Last edited by budm; 11-19-2015, 06:09 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: LG LCD 47LM5850 Contrast/Picture very white
Sorry budm, I was having issues with my computer yesterday. Here are the pics of the TCON.
Attached FilesComment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Can anyone offer some guidance on this tv? Could it be a main board issue or panel?Comment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Too bad, there are no known test points for the Gamma ref Voltages.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: LG LCD 47LM5850 Contrast/Picture very white
Hi guys. I replaced the TCON and Main board in this TV and the screen is still the same. What are the chances of it being the LVDS cable from the main board to the TCON?
Is there a way to rule out the LVDS?
See pic below. There are a lot of vertical lines on the screen. Sorry about screen, customer brought it in this way.Attached FilesLast edited by tech2014; 12-06-2015, 03:50 PM.Comment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Why did you replace mainboard ? Check the tab bonds see if they are intermittent.Last edited by ReeceyBurger123; 12-06-2015, 04:17 PM.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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