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.
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LG LCD 47LM5850 Contrast/Picture very white
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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
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Re: LG LCD 47LM5850 Contrast/Picture very white
Originally posted by budm View Postlooks like bad gamma ref voltages on the t-con. Pictures of the t-con board?.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/
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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=24809
Comment
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Re: LG LCD 47LM5850 Contrast/Picture very white
Originally posted by tech2014 View Postok how do I go about this. I don't see anything on the TCON that says gamma.
'Looks like bad GAMMA ref Voltages on the T-CON. Pictures of the T-CON BOARD?.'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=24809
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=24809
Comment
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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.Last edited by tech2014; 12-06-2015, 03:50 PM.
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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/
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