SHARP LC-70LE550U - side driver issue?

[G_WaTT]

Re: SHARP LC-70LE550U - side driver issue?

Thanks budwich! I wasn't looking into investing a lot of time or money on the set. The living room TV has already been replaced with a 75" Sony and I'm only trying to fix it for my shops break room. I'll be a hero with the guys if this works I'll post whether or not it works once I've removed the tabs. Thanks again!

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

certainly... and you may even get a free lunch and beer out of it. The resulting picture will be as good as the day you bought it... go figure.

[G_WaTT]

Re: SHARP LC-70LE550U - side driver issue?

It worked! Thanks again budwich! For anyone experiencing the same issue, 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.

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

I can almost taste the beer... :-)

[maple1]

Re: SHARP LC-70LE550U - side driver issue?

G WaTT did you remove the driver boards completely? I just got back to mine and used your method of peeling off the tabs then removed the boards and it looks pretty normal now. Hopefully it still works by morning that's when it allways failed before.

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

the boards are of no value.

[maple1]

Re: SHARP LC-70LE550U - side driver issue?

If the Tv works without the boards why are they there? It's like the tv is designed to fail

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

I guess they knew that they needed "spares"... :-)

Obviously, there are some need for them in the design / features. NOTE.... this technique used in this forum is a SAVE of the TV from the dumpster, it IS NOT bringing the set back to "factory spec". That is why it is NOT DONE by factory authorized repair centers. IF the forum had totally knowledge of the design intent, then you would have your answer. Basically, the "speculation" is that they (two sides) are used to provide improve "response"... so perhaps that is now compromised. I know of no one who has gone thru all the "testing" to figure out what works and what doesn't. In general, people are so happy that they got a "working" set again, that they haven't bothered to do much more than watch it..... kind of the "don't look a gift horse in the mouth" syndrome.. :-)

[maple1]

Re: SHARP LC-70LE550U - side driver issue?

Tv is still working great my friend will be very happy thanks for all your help!

[CompGuru]

Re: SHARP LC-70LE550U - side driver issue?

Thought I'd add my findings. Images show that the driver got hot enough to melt the plastic surround.

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

There are two sets up the side.
Did you remove all of them all the way up? Or just one of the two...
My tv is doing the exact same thing on the right side while facing the screen.
I noticed that the copper connections from the board to the tabs is damaged by electrolysis.
I'm assuming due to humidity.
I'm willing to remove the driver board and it's tabs but just want to ask exactly what you did before I go that pot committed
Cheers

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

I would first try cleaning the "obvious contamination" to see if it changes things... this is assuming that you see no visible issue with the driver chips as shown in the pictures in the post. Your "symptoms" might be the same but the "fix" might be different depending on the actual state of the edge board and tab drivers.

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

The only picture I could get at all was with the side drivers disconnected at the white ribbon at the bottom.
I tried all the combos from disconnecting each side from the tcon board one at a time and all other combos...
I said the he'll with it and removed the five tabs and both side driver boards.
And THANK YOU.
Perfect picture......

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

I also have a 70" Vizio that had a horizontal line.
I opened it up and there was a side tab caught folded under the lcd so I took a credit card and freed it up but the the picture went all vertical lines like an acid trip.
Could removeing the tabs solve the same issue even though there are no side driver boards on the Vizio just tabs?
The screen looks the same as the sharp did with the white ribbon disconnected and only that half of the tcon hooked up

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

yep the "save" is the same... just no physical boards to remove. There is a "main thread" on the vizio in the forum where many have worked the issue... of course, do the corner test with the tcon fully hooked up. If that doesn't work, there may be an issue with the tcon as vizios don't have as good a "protection mode" to shut down the set before some components (FETs) die... but are replaceable.

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

Thanks Budwich
You've been a incredible help.
Do I remove all them on the bad side as well or just the one I touched that made it screw up?
I also forgot to mention that the set was on when I touched the tab that made me lose the picture.
So I may have damaged the tcon I assume.

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

IF your picture didn't come back during the "corner cable test", you have other issues. I wouldn't be so quick on the tab removal until you address those... because it is quite possible that the tabs are find and that some "small event" happened which took out the TCON devices. Anyways, since you know the side that you touched, disconnect that corner cable, fix the tcon (if needed), put the tcon back and you should get a picture. then go from there.

My read on vertical lines in this case is much like disconnected tcon... meaning you lost something in that tcon on that side... assuming that the vertical colored lines are only on one side. :-)

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

Budwich is this what she would look like if it took out the tcon

[budwich]

Re: SHARP LC-70LE550U - side driver issue?

hmmm... I wouldn't expect that many lines across the screen...
but... is this a vertical or horizontal picture. My take is its vertical but there aren't many visual clues... :-)

Further is that half the panel or the whole panel?

Lastly, how did you get to this point??? :-) sorry I can't provide more guidance as it is strange and further I haven't actually seen a vizio in the flesh, only reading / following the vizio thread as I worked on the sharp.... since the panels are the same.

Does the vizio have 4 tcon cables or just two?

[Shaggybamboozle]

Re: SHARP LC-70LE550U - side driver issue?

Sorry for being vague.
It started with a faint horizontal band across the middle of the screen.
When I investigated, it had a side driver tab kinked under the lcd panel.
I took a credit card and freed it from under the lcd and like flicking a switch the picture went to the image I posted.
The picture is now vertical lines over the whole screen and it's quite psychedelic.
The pic posted last night is the whole tv both sides.
It has a single tcon with 2 ribbons.
I'm wondering if when I touched the driver tab if I shorted something on the tcon.
The only reason I'm bugging is that the sharp tv would display the same lines and patterns while trouble shooting to determine which side to remove the driver boards.
Either way thank you again for all the advice.
Cheers