Sharp LC TV Dead

[Todd S.]

Hello,

I posted a question regarding this TV several weeks ago and realized I didn't include enough info. Here is a description of the problem with photos.

Model number is LC-70TQ15U.

* The set has no picture, sound or anything.
* The standby light is on steady.
* There are no visible problems with any components.
* When the power button is pushed, a tiny green LED lights up on the main
board but then goes out after 3-5 minutes.

https://www.badcaps.net/forum/attach...1&d=1483049055

Here are voltages I found on the power supply:

https://www.badcaps.net/forum/attach...1&d=1483050151

https://www.badcaps.net/forum/attach...1&d=1483050151

https://www.badcaps.net/forum/attach...1&d=1483050151

https://www.badcaps.net/forum/attach...1&d=1483050151

Any help is greatly appreciated.

Thanks

[budwich]

Re: Sharp LC TV Dead

I posted what you need to do... there are lots of threads in this forum dealing with fixing and or saving the sharp 70 in sets in general. Most deal with tab driver issues but some have other issues... all covered by recent threads.

You might want to label / cross reference the voltages that you posted with the actual so that people don't have to figure out your drawing.

[Todd S.]

Re: Sharp LC TV Dead

Thanks for the reply Budwich,

I did go to the Sharp 70 threads and spent hours. None were able to help. Another member said to add photos, so I did. Thought I would give a new thread a shot. My drawings have a photo of the actual plugs included.

[budwich]

Re: Sharp LC TV Dead

hmmmm... did you actually follow any of the "advice"... disconnecting tcon, disconnecting "corner cables"... what were the results? Your "none were able to help" has very little information as to what you actually did beside reading... I hope you were looking for "if you got this, change this, replace that".... it ain't going to happen.

Further, if you look at the "stickies" at the start of the forum, you may get some help if people can readily know what tv you are referring.... so you aren't even following the "basics" for the forum. I don't mean to be the "forum police" but I know the guys here are good and IF you do some stuff and provide good information, you will likely get your set fixed one way or the other.

Anyways, you have provide some info but you need to do more. Let us know what happens with the suggestions.

[Todd S.]

Re: Sharp LC TV Dead

Ok went looking some more. Can't find a post with my exact symptoms that helped.
This is what I have done:

I have a steady standby light.
No picture
No sound
When I hit the power button nothing happens and standby light remains on.
I have 120 VAC to the power supply.
The fuse is good.
There are no bad caps or any other components that display damage.
I have power coming out of the power supply but I don't know if they are proper voltage. (listed in first post).
A small green LED lights up on the main board when power button is pushed.
When powered on there are no back lights
Flashlight test showed no images

Not sure what to do next. Thanks for any help.

[Todd S.]

Re: Sharp LC TV Dead

I also did all the resets to no avail.

[Todd S.]

Re: Sharp LC TV Dead

After removing the two left ribbons from the TCON I now have half a screen and all back lights are looking good. I reversed the process and nothing. blank screen dead tv.

Any advice is very much appreciated. Thank you.

[budwich]

Re: Sharp LC TV Dead

:-)
isn't that interesting... guess those other threads had some useful information after all.

It is more than likely that you have a panel issue (side tab drivers are bad). :-(
The set can be potentially saved... the drivers CAN NOT be fixed, they can only be removed... BUT its a "one time event"... ie once they are removed, they can not be put back.

As suggested, read or re-read the various threads on sharp 70 where people have done the "save". You basically need to connect back the tcon. Next, you need to look in the lower corner of the panel on each side. There is a small white ribbon cable interconnecting the side edge boards of the panel to bottom edge boards of the panel.

Just like your "tcon test", you need to disconnect one of the corner cables. What happens with the display. Repeat the "test" for the other side. These tests will confirm which side is bad. You can go from there.

[Todd S.]

Re: Sharp LC TV Dead

Yes they did.

I replaced TCON ribbons and removed the ribbon on the right side in the lower corner and the TV wouldn't turn.

I then replaced it and removed the left side (facing from the rear) and tv turned on with back lights. The photos are the result this. I will check for more useful threads later today.

Thanks again for the help.

[Todd S.]

Re: Sharp LC TV Dead

I removed the Right side driver and found this.



The arrow indicates location.




I am assuming that this is my problem. Would love your opinions.
Thanks a bunch

[budwich]

Re: Sharp LC TV Dead

It would certainly appear that you have found your issue ... :-)
I knew you would ... with a little help ... :-)

Basically as most have found, IF you carefully remove the tabs drivers along that side (5 I think) by pulling them away from the panel (almost like tape coming off a piece of paper), your TV will be almost as good as new.

[Todd S.]

Re: Sharp LC TV Dead

Removed tabs and:

147862&stc=1&d=1483537665

Ta Daaa!!

Thankyou all contributors to this forum especially Budwich. This TV works and it didn't cost a penny.