I Have seen this before when half of the screen goes dark and it looks like the darken side can 't keep up with the video it laggs behind. I have taken apart the tv and pushed on both the most furthest right and left tabs and the picture then goes perfect. except now the picture is washed out. The picture is all white and very faint. and looks alot like a negitive. I wanted to see what you would suggest I start with. replacing T-con or Main board? thanks for you help.
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Last edited by ntehicks; 10-27-2014, 10:47 AM. -
Re: Sanyo dp46848 half screen dark and lagging
You can test the gamma voltages on the tcon to verify the as15 chip is malfunctioning. the voltages should evenly increase or decrease by about 2 volts per test point. although with already failing tab bonds it may be a tab bond issue causing the low contrast picture.Liberating magic smoke one part at a time -
Re: Sanyo dp46848 half screen dark and lagging
Sounds like you have two faults - tab bond and AS15 gamma IC...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: Sanyo dp46848 half screen dark and lagging
I have a Sanyo Model #DP46848.
My problem is a color and ghosting, or imprinting of the last words. Not fading or lines not unless you have the menu on, then you can see fading of lines.
I have taken pictures of the symptoms but I am new to this website.Comment
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Re: Sanyo dp46848 half screen dark and lagging
See my note from earlier.
When turning on at first, it had flickering to normal color but only for a second. Then after it had completely warmed up, it remain with these issues.
The TV sat in our bedroom, not used often. Bought it in 2010.Attached FilesComment
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Re: Sanyo dp46848 half screen dark and lagging
I seen this problem before that twe2011 pictures are showing. I replaced the main board and the problem was fixed.Comment
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Re: Sanyo dp46848 half screen dark and lagging
I would wholeheartedly agree with Tom 66.as15-f ic's are poor on reliability,the RM5101 is a direct,much more reliable gamma ic.Bit more expensive,however.Along with tab bonding.Comment
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Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same... -
Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!
My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.
This time the original cable broke too close to the screen, it can't be fixed without tearing the screen... -
The 55" LG has been in the basement for a few months without being used. Turned it on yesterday, set came on as it should and showed a complete screen for about 5 seconds (was on a broadcast channel but no antenna was connected), then the screen went mostly dark with about 1/3 of the screen on the right lighting up with brighter lines in that lit part (sorry, no pictures of that). Power LED was cycling too, preventing the TV from fully powering up.
Pulled the back off, all boards looked OK. Pulled the LED connector, turned the set on to see if it would power up but I don't belive it... -
good night! I have this screen that looks half black and half white. the tcon gives a low vgh value (5-6v). the rest seem fine. I first removed the flex from one half of the panel and then the other. Removing the left, vgh increases it to 25-26v. I think the problem is in that area, but there are not many elements on the integrated controller board. there are no shorted capacitors. could they be a cof? Some help?
By the way, now the entire screen is black. Maybe some flex was not connected correctly... I have exchanged the flex and there are no variations, I don't think they are the... -
I found another post on this site the other day which has been very helpful in troubleshooting this issue I am having with my tv. The left half of the screen is dark, and the other half is VERY slow to generate it's image - and it only generates part of its image at that.
Based on this yt video, I have narrowed it down to an issue (short?) on the left side of the display, somewhere in the system of ribbon cables.
when I remove the bezel and the rear cover, I can get the image to display correctly by manipulating the ribbon cables on the left side which connects the left lower display...
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