i have a baird 42in lcd with a psychedelic effect, the menus and picture are affected.
is this likely to be the mainboard, t con or screen?
is this likely to be the mainboard, t con or screen?
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Re: psychedelic effect on screen
That looks like Gamma ref voltage problem, the circuit is on the T-CON board (it is under the metal shield locate about top center of the LCD panel. Pictures of the boards?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: psychedelic effect on screen
the main board is a cv109h
and the panel is a chi mei one, with a v420h1-c15 t-con
worth a try on the tcon?Comment
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Re: psychedelic effect on screen
I would actually say it looks like LVDS setting is wrong on main board.
On these models: service menu is SOURCE 3690. Then go to panel option and try to change settings.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: psychedelic effect on screen
hi tom do i enter that with the remote? there is no 'source', 'input 3690' doesn't seem to do anything?Comment
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Re: psychedelic effect on screen
got it, input 2580, i changed 'ti mode' to on, in the 'function' menu
that made the menus look normal but still no picture, so i tried 'reset'
everything is back to normal!
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Re: psychedelic effect on screen
Good troubleshooting, Tom! I have seen this same picture in Insignia, replacing the AS15 solved the problem, just goes to show that it cannot be 100% for sure, it is good to have people like Tom that have seen problem like this before and able to solve the problem.Last edited by budm; 11-21-2013, 12:05 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: psychedelic effect on screen
Nice fix. The reason I disagreed with gamma chip fault is the transitions are too sharp. With gamma chip going bad the picture can look similar, but the transitions are completely smooth.
The menus looked similar to a 24" Bush I did and Source 3690 was for that, obviously this is slightly different.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: psychedelic effect on screen
Ah, thanks for the tip on the transitions.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: psychedelic effect on screen
I have one doing the same thing at the minute, so i will give this fix a try tomoz
:-) fingers crossed!!Comment
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Re: psychedelic effect on screen
Excellent fix.......so far so good! :-)Comment
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