Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

[G_WaTT]

TV is approx 2 years old. Used frequently until 2/5 blink pattern of death (2-5 error code) appeared. I disconnected all 4 ribbon cables and the backlight comes on with the 2/5 blink pattern replaced with a steady glow. I've read on this forum that this means the panel is bad, but if the 2/5 blink pattern persists the T-Con needs to be replaced. Is this correct? What should be my next step?

[budwich]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

nope... unlikely. you need the follow the advice in some of the other threads. disconnect one of the corner cables... bottom right or left on the panel. With all the tcon cables connected, you should get a picture depending on which side is disconnected. That will tell you which side of the panel is possibly in trouble. go from there.

[G_WaTT]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

budwich, thanks for your help. I disconnected the right corner cable (as viewed from the back) and the screen came on! I've posted a picture below of what the screen now looks like. I believe I can solve the issue by following the steps in this thread:https://www.badcaps.net/forum/showth...ht=sharp+aquos
Seems to be the "classinc tab issue." I will now begin to look for the culprit (bad tab/ and or bad tab driver)
Is there any need to see how the screen looks with the other corner bale disconnected? Am I heading in the right direction?

[budwich]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

good progress... :-)

since the "tab operation" is not reversible, you do want to be careful. I would reverse the "corner cable disconnect test" to confirm that indeed the set does not come on... telling you that the now connected side is bad... hope that isn't too confusing. Then yes there are a number of threads that will get you thru to "removing" the failing tabs drivers and getting you a good picture again. Hope that helps. One other thing, if you get a source with a proper test pattern (color bars or equivalent), then people will readily see from pictures if you have specific issues and that they are addressed.

I think I can see the "standard horizontal lines" issue in your picture BUT it is hard to tell because the source picture is too busy.

[G_WaTT]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

Copy that. I checked for bad tabs/ tab drivers and didn't see any that looked burned out as in the thread I linked to above I will reverse the corner cable disconnect test to confirm the set does not come on. Below is the test pattern on the screen in its current state. Please notice there is black bars to either side of the test pattern since I could not get it to fit to screen. I have also included an image of the test pattern image I used. Hope this helps. Thanks again!

[G_WaTT]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

I tried disconnecting the left corner cable (as viewed from the back of the set). Screen is off with 2/5 blink pattern. Is there any point to inspecting the tabs/ tab drivers on this side?

[G_WaTT]

Re: Sharp Aquos LC-70LE755U - 2/5 Blink Pattern

It worked! I had removed the corner cable that had given me half a picture (right corner cable as viewed from the back of the set) and continued to remove the tab drivers on the same side. For anyone experiencing the same issue and wanting to remove these tab drivers, but unsure of how to remove these side tab drivers, I'll explain best I can on removing these. With the back cover off and the back of the set exposed I continued to remove the bezel which frames the front of the screen. I only removed the top and side screws. Removing only the top and side had given me enough room to remove the tabs on my particular set (LC-70LE755U). Working from top to bottom I would grab each tab and peel it forward towards the front of the set. DO NOT PULL OUTWARDS OR TO THE SIDE!!! There is only about 1/16" of these tabs connected to the screen and pulling outwards may tear the thin tab leaving remnants of said tab on the set (I had done this on a tab, but was able to remove the left overs with tweezers). It's very similar to removing a sticker. Once all tabs are removed I crossed my fingers and turned the set on. This worked out for me and this seems to be a common problem, but I also know this solution is a last resort. This solution is not reversible.