Had this tv for about 3 years and it developed this "Negative Picture" like a photo negative. Sound on this set works fine, negative picture is on all inputs. Did a reset from diagnostic screen(Volume down+Input>Connect power etc.....) same result. Found a video on Youtube(2 years old, fix in comments- http://www.youtube.com/watch?v=UEfa-...eature=related ) featuring a Samsung LCD with the similar issue and took the tv apart found the said board to be insulated from touching any metal so the problem wasn't there. Found this thread( http://www.avsforum.com/t/1170984/so...d/forumId/166# ) with a Sony Bravia, similar issue and their end result was the T-Con board. Swapped the T-Con with another from Shop Jimmy, same problem. Found a few other threads saying it was the Main bd(would be my next move unless I can get some better advice here). Just looking for some useful help without having to spend an outrageous amount of money to fix this tv ~Aloha~
Sharp LC-52D64U-Negative picture
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Re: Sharp LC-52D64U-Negative picture
Have you tried these steps? They apply for LC-32SD1E but may be similar enough:
http://www.tgohome.com/ServiceManual...epair_tips.txtPlease 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. -
Re: Sharp LC-52D64U-Negative picture
I would have suggested T-con. The only board left that could cause this is the main board. Although are the power supply voltages good? What does the T-con run off?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: Sharp LC-52D64U-Negative picture
It's possible, though unlikely. The T-cons on shopjimmy are reclaimed from cracked screen TVs so could be faulty.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: Sharp LC-52D64U-Negative picture
ShopJimmy have a warranty, don't they? Ask if you can exchange it as you suspect it's faulty.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: Sharp LC-52D64U-Negative picture
sent them a message about an exchange, so I'll need to wait and see what their response is. But I hope someone can recall anyone else having the same type of picture problem I have and what the remedy was......hopefully not a bad panel.Comment
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Re: Sharp LC-52D64U-Negative picture
Contacted ShopJimmy about their T-Con board(discoloration and cracks can be seen in their advertised pics, if you zoom in) and they gladly exchanged it for another. Hmmmmmmmmmmmm, same discolration on the new board but not as bad no cracks. Same negative image result. My guess that the T-Con board is not the issue. Has anyone seen or heard about the symptoms that my TV is having??? Suggestions on any test to try???Comment
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Re: Sharp LC-52D64U-Negative picture
@tom66 or anyone who can help......
Replaced main board and symptoms changed. Connected the power and I get 2 clicks. TV doesn't fire up. Green OPC and Power lights flash together once then the green Power light flashes once by itself then repeats. Thanks.Comment
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Re: Sharp LC-52D64U-Negative picture
New board is an exact match with the old one(only 2 types for this model). I put the old board back in and the TV fired up normally(with negetive image) Put the new board in again same clicking no power, did the force power on and the TV fired up with the negative images. Probably could get the TV to fire up with the new board if I clear the error codes in the diagnostic mode. But got the kids running around right now so it'll need to wait. Any Ideas?Last edited by buuhaahaa; 09-13-2012, 09:32 PM.Comment
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Re: Sharp LC-52D64U-Negative picture
This is a long shot, but LVDS cable. You could test continuity between each connector to see if the problem is "prevention of data" lol. Or altering thereof.
Or could be those boards on the side of the panel.....but this is seeming more likely.Comment
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by MikeRWKThis only affects the picture but not the tv menus. Selecting any of the default picture settings gives a negative picture but turning the contrast down to 5 'fixes' it but then the tv is too dim which is hard to tell in the pictures.
This tv has a main board, scaler board, and a tcon.
I tore it down so I could probe the tcon which is nicely labelled. I've also included a pic of it.Here are the voltages I got:
VGH 32V
VGL -6V
GAM1 14.6V
GAM18 185mV
VLS 14.67V
3V 3.01V
RESET 2.95V
TCLK 0V
SCC_VDD... -
by JJAAMMThis was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.
Problem
TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode... -
by TR103Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
by BeeShadowHey everyone! I inherited a "free" Sharp lc-70le755u with a strange picture issue. To try to explain, the picture flickers before what I think is a power saving mode kicks in and reduces the back light. I took a short video and uploaded it here:
https://imgur.com/NAou7aP
I'm thinking it could be the TCon board, but possibly the panel. Thought it might be worth it to post here and see if anyone has a better idea before I try throwing parts at it. If its the panel (which I hope its not), then I won't bother trying to fix it. -
by MgiffuneI have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started βfading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly βnew' Tcon board this time, and... - Loading...
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