Sharp LC-70LE757U flickering display

[grizgza]

Re: Sharp LC-70LE757U flickering display

With right side frame ribbon cable in bottom right disconnected:
http://imgur.com/unIHYDM

With right side t-con cable removed:
http://imgur.com/28ZzD5d

[grizgza]

Re: Sharp LC-70LE757U flickering display

I just noticed that my comments on which side were clear when unplugging t-con cables is reversed. I need to make sure I get the side right lol.

When I unplug the right most (when looking at back of tv) t-con cable, the right side of the TV is perfect with no flickering.

When I unplug the left most t-con cable, there is still flickering across the whole panel.

[grizgza]

Re: Sharp LC-70LE757U flickering display

Here is a photo on white background.
http://imgur.com/7PIboMG

I can't tell if the bars are any darker on either side. But I do see 2 anomalies on the left side of the screen. In the bottom left there is a little diagonal line, that seems permanent. There also seems to be a dark shadow on the middle left side on the bottom half of the screen. You can see both of those things in the photo. The right side looks more uniform.

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

Can you take a picture of what the screen looks like with anything but a black background like maybe a white screen or a blue screen see if the black bars are darker on one side. It sounds like a short in right-hand tab drivers

[grizgza]

Re: Sharp LC-70LE757U flickering display

Further observations:

When the far right t-con cable is disconnected I get a clear picture on the right (no flickering).

When the far left t-con cable is disconnected I get a picture on the left, but with the flickering.

I also noticed a buzzing sound coming from the t-con board when the far right cable is attached. If I disconnect that cable, no buzzing and no screen flickering.

Could this indicate that one side is faulty?

EDIT:

I tried disconnecting the ribbon cable on the bottom right on the frame of the tv (not sure what these are called), which results in no flickering but a dark (left) half of the screen.

If I disconnect the left side cable, I get the flickering.

[grizgza]

Re: Sharp LC-70LE757U flickering display

I don't know if this means anything. But here are a few additional observations.
After I started pulling t-con cables and testing, now when they are all plugged in normally it immediately has the flickering display issue (not after 1-2 minutes).

Also, I tried powering on/off the TV several times and now the display is not flickering and is not dark like before, but still has the large black horizontal bars going up and down the screen.

[grizgza]

Recently while watching TV, the display suddenly went bad.
This was not recorded by me, but shows the exact problem my TV is having:
https://www.youtube.com/watch?v=bxQE83bc3yc

When powering up the set, the picture first looks perfect for 1-2 minutes. Then it will start with the flickering and horizontal black bars going up and down. It doesn't seem to snap back to normal without powering the TV down and powering it back up. The flickering is apparent across all inputs and menus.

I'm trying to identify if it is a bad panel, or perhaps a t-con board (or other board) issue that can be fixed.

I tried pulling the right-most t-con ribbon cable from the board and the flickering immediately stops and one half (right) of the picture looks perfect.
http://imgur.com/eSKg2gl

I tried pulling other combinations of t-con cables with different results. Most giving me a 2-5 blink pattern.

Unfortunately, these TV's failing seems to be a trend recently. I saw some other threads where people had luck disabling one side's drivers. I don't know if this fix would apply to this set?

Should I order a replacement t-con board on eBay and cross my fingers?

Thanks!