Question about Sony Bravia KDL-40S4100 40 in. LCD TV

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Sony Bravia KDL-40S4100 40 in. LCD TV screen is black, but sound works fine.

TV will not get a picture. Sound works and you can tell that other functions work by listening to sound... just no picture... completely black.

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  • Jim Scott Jan 30, 2013

    How do I know and is it an easy fix?

  • DENNIS MITCHELL Jan 31, 2013

    the inverter is the only part that makes the backlight come on it may be part of the power supply how old is this set?

  • DENNIS MITCHELL Jan 31, 2013

    the inverter is the only part that makes the backlight come on it may be part of the power supply how old is this set?

  • Jim Scott Jan 31, 2013

    Is the "backlight" some type of bulb and is it replacable? Just wondering if it could be as simple as that How hard is the invertor to replace and costs?

  • Jim Scott Jan 31, 2013

    Set was bought in summer of 2009.

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I'm working on the exact same problem on the exact same tv right now. Most everything I've read said to check the capacitors to see if the tops are bulged or if ones leaking out of the bottom. and if they are good then the next logical and easiest thing to fix is the inverter board. I got one on eBay for 10.49 with free shipping. But sadly that didn't fix mine. So now I'm looking for the next thing to fix?

Posted on Sep 20, 2015

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  • Master
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Sounds like a bad inverter board.

Posted on Jan 30, 2013

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Posted on Jan 02, 2017

welcomejee

Shahid Electronics

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SOURCE: Sony KDL-46V3000 Bravia LCD Black screen

Please count Sony KDL-46V3000 standby light blinks as there would be interval of 3 seconds between blinks. Let me know how many times light blinks as its an error code.

Posted on May 17, 2009

mahesh patel

  • 197 Answers

SOURCE: Closed Caption not working on my Sony 40" Bravia LCD TV (KDL-40

turn cc on receiver

Posted on Jun 09, 2009

vinnyq

vinnyq

  • 157 Answers

SOURCE: sony bravia kdl-52w3000, turn tv on, no picture or

Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.

To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).

Posted on Oct 07, 2009

Anonymous

  • 148 Answers

SOURCE: 2 years old Sony Bravia KDL-52W3000 flat screen- I

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! ..Here is a picture of what you are looking for inside the tv...I hope this helped, if it did (or not)please rate, thank you!9441f5a.jpg

Posted on Feb 03, 2010

Anonymous

  • 49 Answers

SOURCE: sony 46 KDL 46S2000 screen went black and the

you can referen the article:

How to Fix a Black Screen at Startup
maybe it can give your some help

Posted on Mar 05, 2010

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