Question about Sharp LC70LE732U AQUOS 70 LE732 LED HDTV

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My Sharp LC-70LE732U has had 3 failures of the LCD Panel Control Unit. What may be causing this?

The board has been replaced twice. After receiving the TV just before Xmas 2013 and plugging it in, all I got was the flashing 2 slow 5 quick sequence. The board was replaced. The TV worked for a short while and the same thing happened again. The board was replaced again. The TV worked for about 2 weeks and died again....same flashing sequence on turning on the TV last week.

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  • Expert
  • 181 Answers

Hello. To me, it sounds like a factory misshap of a internal grounding conection.

Posted on Apr 18, 2014

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  • Sharp Master
  • 74,106 Answers

Have you checked the output voltages that comes out from its main power regulator board [SMPS]? If the voltage comes out of it is abnormal (grater than normal); this kind of failure can occur. Contact any service technician, to check it. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magzine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Posted on Apr 18, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 33 Answers

SOURCE: Set up only visible for 2 seconds, then black - Aquous lc-37d43u

Unfortunately I can promise you that you CANNOT repair this. Your power and opc lights coming on, but the tv is not coming on. That is a issue within the tv. Give sharp a call and they will have somebody come fix your tv free of charge, if they cant fix it, they will replace it for free. That is the only thing you can do. Sorry bro

Posted on Dec 12, 2008

dsacco86
  • 1077 Answers

SOURCE: Sharp LC-26D43U Power light flashes and unit won't turn on?

It's a power supply related problem. When it turns itself off, this it called protection mode. The TV automatically turns off to protect other parts form being damaged.
The most common problem is the Power Supply Unit or the Backlight Inverter Board.
You may have to take the TV to a repair shop to find out which one is bad. Paying a repair shop to replace the board for you maybe more than the TV is worth. If you let them diagnose it and you replace the bad circuit board yourself, it would be cheaper.

Here's a place I use to get parts for TVs:
http://www.shopjimmy.com/catalogsearch/result/index/?q=LC-26D43U&p=1
The problem is the repair shop may charge you double or three times of what the part costs at the web site link above. Then, plus labor. I just want to save you money. :)

Posted on Jun 03, 2009

  • 8457 Answers

SOURCE: Cracked Sharp LC-46D62U lcd panel.

look up your local repairman they should have part.The part it should cost about $150,labor must ask.

Posted on Jul 01, 2009

circuitworld
  • 335 Answers

SOURCE: Sharp LC-37SH12U LCD TV is 20 months old and would not power on

Your power supply unit needs servicing on some part replacements. bad capacitors, voltage regulators, hi-watt resistors,....etc

Posted on Nov 03, 2009

  • 148 Answers

SOURCE: Sharp Aquos LC30HV4U stopped working

You are in luck!..The units poowerboard is overheating and since you have it taken apart already this is the fix for you!...Check the popped capacitors in the metal box you find on the back of the actual screen inside the unit...This is a very common problem,m so I've helped many this way and wrote a general post on the how to's of diagnosing and repairing the problem, follow these steps and your tv ill be good as new for less than $5.00 before feb 5 th!! :P...Here it goes (please rate if this works out :D).....................The caps (capacitors) in the powerboard are going out. This is a very common problem in all class and price ranges of modern lcd and plasma tv's/ monitor's. I don't know if this problem has been like this for awhile or it just started, but either way, if the tv takes an abnormal amount of time to "warm" up then it most likely will go out all the way sometime in the (near) future. If you have a tiny bit of will and knowledge ypou can open the unit and get to the print board. Examine this for "popped" capacitors, they will have a buldging top instead of a flat one. Im gonna try to include a pic of them here, if i can get it this time, I've tried bfore lol. But you can google image a "popped" or "bad" capacitor and you would be able, with ease, to diagnose if you have any of these. Usually only one or two. Radioshack sells capacitors (couple anyway) for $1.59 each. MAKE SURE the replacement is of the SAME voltage or HIGHER, or you will be right back replacing those 2. Every capacitor has a negative pole marked with an (-) on the side of the capacitor(by one of the "legs", always puit the negative (-) "leg" of the new capacitor in the same hole in the printboard as where the previous negative (-) "leg" of the capacitor was ( a capacitor with the negative and positive "legs" put in backwards will result in the new piece "popping" as sson as you turn it on!!) make sure the "uf" rating (for example the most common popped capacitor is the 1000 uf) is the same as the one you are replacing. I needed 1000 uf, 105 c and 26v (volt) ratings for the 1 capacitor I needed to replace to fix my LG 19" lcd panel monitor I found by the trash that the light came on off, but it didn't come on. I replaced that capacitor with ; 1000uf, 85 c and 36 v (volts0...It works fine eventhough the volts and the temperature rating (36v and 85c) was not the same as the (26v(volt) and 105c ) capacitor I removed !! Further, I've replaced capacitors that had the celcius rating of 105 with the only ones Radioshack had, namely 85 c(celsius) they have been working great, but I'm not sure about any effect, nor have I heard or read (yet?) about that making an urgent difference. Many threads that I've read people have done the same, so we should be ok (my stuff has been running good for a while longer then most brand new ones!.............(all these ratings ; 'uf ' and 'c' etc are on the side of the capacitor you are replacing and on the side of the ones you are replacing them with)...For all this all you need is the cheapest solder gun u can find (I bought one for $7.99 at Radioshack), a camera (to take pictures as you go to remember how to reassemble the unit) and, once you have your materials, 20 minutes to replace 2 or 3 capacitors and you are good to go...Most monitors and tvs (lcd/plasma) I've seen you have to lay flat on the ground/bed/blanket etc, to work on (screen side down). Usually there are 2 or 3 screws (or a few more) to remove, then you will have to carefully (its comes off easily most times)insert a flat screwdriver inbetween the casing and gently pry it up as you go around the whole frame. Sometimes you have to remove the little washer arouind the cable input orso, just be gentle and you cant go wrong. Once insidet here will be a box with wires running to the sides etc...unplug, gently, these wires and open the box. Inside you will find 2 or 3 circuitboards, check them all for "popped" capacitors, replace, reassemble and plug it in....Have fun becoming an overnight tv mechanic lol!

If this has helped anyone (or not) then please rate, thank you!

Posted on Feb 03, 2010

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I've been repairing TV's for over 15 years and I would say either a bad Tcon's or main board issue. Theirs no need to replace capacitors these days, you can get the main board from $40-60.
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