Sharp Aquos LC-60LE832U No Backlight or Picture

[Sfuchs]

The TV I am working on recently was struck by lighting. I have replaced the Power LED driver Unit (RUNTKA798WJQZ), Main Unit (60LE830U DKEYMF733FM01) and LCD Control Unit (RUNTK4910TPZZ). Before these changes it wouldn't even come on, now the center LED blinks (one long and one short) indicating there is a Lamp Error. There is no backlight or picture.

I am at a loss on what to do next assuming anything can be done. Please help!

[johnboy1313]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

If the main board you bought was pulled from a set that was flashing a 1-1 code like yours, the error will move with the main board. If the main board is brand new, then you probably have a bad LED inside the panel.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

What can i do to narrow it down to which on it is? Is there a voltage or signal i can test? The main board came from Shopjimmy which is a repair provider. If it is the LEDs, is it worth repairing?

[johnboy1313]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Out of multiple purchases from ShopJimmy, I personally have only received one board that worked. Every single time, except once, I received a dead board from them. One time they had to send three boards to get one that actually worked.

[Ltank]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

I have good luck with SJ. I have ordered over 50 different boards from them and only had two bad boards.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Well that kinda sucks. Nevertheless, can someone answer my previous question?

[mattstolte]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Unplug it. hold channel up and volume down at same time while holding plug set in. And let me know.out come. You are forcing the set to come on

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

This tv has the softkeys, i pressed the volume - and channel up and then plugged it in, nothiing happening other than the light contining to blink.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

I am so pissed right now. So i pulled the main board and decided, what the hell lets connect up the old one. The dispay comes right on but since this board was damaged by the lighting, there is no picture, just backlight. Then i turn over the one i bought and on the back it says "good need lamp error reset" now why the hell would they sell me one that needs a reset??? Anyway, any clue how i can reset it on this TV? I have tried multiple key combonations with no luck. Thinking of just sending it back and getting another.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Got into the service mode but no text on screen.....

[truep]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

check for power to the TCON.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

In Summary, here is what I did to fix my issue. Hopefully this helps someone else in the future with their issue.
I first replaced the Power LED driver Unit (RUNTKA798WJQZ), Main Unit (60LE830U DKEYMF733FM01) and LCD Control Unit (RUNTK4910TPZZ). Before these changes the TV wouldn't come on. After these items where replaced the center LED blinked (one long and one short) indicating there was a Lamp Error. There was no backlight or picture.
To confirm the screen and LED’s were good, I put the TV into lamp error disregard mode by
holding Vol- and Ch+, press power. This is not always easy, it may take many tries. You will know you are successful when the icon is steady lit.

If the LEDs do not come on at this point then you need to disassemble panel because you have a bad LED.

In my case the LEDs lights came on however I still had no picture. I discovered that the replacement LCD Control Unit (also known as a TCON board) was bad, so I took a chance and put back the old unit. I then got picture.
After that all I needed to do was to get into adjustment mode to reset lamp error. I used key sequence mentioned in this YouTube video to enter the “K” menu.
https://www.youtube.com/watch?v=5wUuARpFe90
After the reset, the TV powered up and worked normally Thanks

[budm]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Great job, you probably should low down the backlights level as low as possible to extend the LEDs life.

[electronicsurplus]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Is there some other way to force this set on? Since the Softkeys will not work

[electronicsurplus]

Re: Sharp Aquos LC-60LE832U No Backlight or Picture

Is there some other way to force this set on? Since the Softkeys will not work

I actually decided to solder wires onto the tabs as a test and it actually worked since I tried several times holding fingers on the softkeys and, got the light to stay solid

Just thought I would add this in the event someone else runs into the same problem

But, still no backlight nor video at all