20 Most Recent Sony BRAVIA KLV-S40A10 40 in. HD-Ready LCD Television Questions & Answers

More information is required. Your backlight is lit (screen not dark) but I need to know what you have connected to the TV (your sources) and how they are connected. Does the menu/OSD (on screen display) work?

Sony BRAVIA... | Answered on Nov 30, 2018

maybe it is the panel eeprom,if the panel inverter is good which should be treated with experts

Sony BRAVIA... | Answered on May 20, 2015

On the original SONY remote press display to remove that---if left on long enough it will actually burn that image into the screen--button on almost any Sony Tv remote will remove or clear it.

Sony BRAVIA... | Answered on Jan 11, 2015

Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and precious time.

Sony BRAVIA... | Answered on Aug 18, 2014

More information is required. What do you have hooked up to the TV and how is it connected? Do you have a menu/OSD (on screen display)?

Sony BRAVIA... | Answered on Dec 01, 2013

7-blinks denotes a fault with its digital processor board. If you wish to get more details about the blinking codes to Sony TVs, check this link. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

Sony BRAVIA... | Answered on Sep 29, 2013

7 blinks in the this series(KLV) means there is a short in the power supply board. The easiest way to fix this would be to swap out the board. I can find you a replacement if you want to try fixing this yourself.


Sony BRAVIA... | Answered on Apr 24, 2013

Hi sandersonkie,

Sad to say because 4 flashes of the led light at the front panel is an error code for faulty "LCD Panel". This is the expensive parts on the unit, almost same cost of a new set if you are going to send it in for parts and labor. Check if your unit is still under warranty/extended warranty period, avail it because the manufacturer will fix it for free. If not, new unit is more practical than to send it in.

Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Sony BRAVIA... | Answered on Mar 01, 2013

Either the 24vdc power supply or the backlight inverter board is bad, you need to troubleshoot the problems.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:



Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

Sony BRAVIA... | Answered on Jan 14, 2013

Do you mean the bm board? bm board is the designation Sony gives to the main video board on LCD TVs. Problems/distortions in an image or picture are usually related to either the BM board or the LCD panel itself or it's t-con board.
I'm not sure what you mean by "web like screen". Can you elaborate? The only thing I think of when you say web like screen is a cracked screen with spider-web cracking over it.

Sony BRAVIA... | Answered on Dec 15, 2011


If the screen is dark and there is still sound is usually because there is no power to the inverter board. Parts that cause this are inverter, power supply or main controller board. Power to the LCD panel should also be tested.

before declaring the TV faulty make sure that the problem is not cable settings or source selection.

Check if there is on screen display (the menu). If OSD is displayed, then the problem is either cable/source settings or a defective input circuit. Try also disconnecting power cord for ten minutes and then up to one hour. Power drain may fix temporary faults.

If all that does not work, then the problem is either inverter or power board. In some case the main controller board may also be responsible.

The inverter is a power board that converts DC voltage from PSU into AC high voltage, powering the whole backlight system. When there is a problem with the inverter the whole screen will be completely dark, while the sound keeps going on.
A problem with the inverter will mean that either inverter is bad, power supply is bad and does not power the inverter, or main board is bad and does not turn inverter on. Those are the three parts that must be tested when the inverter does not fire up ( sound and dark screen). Here broad description of how to test the three parts: Before proceeding...

From a user level point of view, all you should do is disconnecting power cord for fifteen minutes, and testing the TV with different connected devices and different cables (e.g. with a DVD, a receiver box, using a SCART and using HDMI).
Disconnecting power will allow a power reset that sometimes can fix temporary problems (usually not sound but no picture).
Testing different cables and devices excludes the chance of the problem being given by a bad cable connection.

If that does not work, call the manufacturer at the number listed in the owners manual. Verify warranty status (warranty may have expired 09/10). Make present to the operator that the TV is just out of warranty, and that the fault occurred without you making any wrong use of the TV. Some manufacturer in some case apply special condition.

Here replacement parts for most flat panel TV models:ShopJimmy.

See also:



Sony BRAVIA... | Answered on Sep 14, 2011

Your TV should have component inputs to connect your PS3 to. You will have to get an adaptor such as appears on the link I have provided. You will only be able to use resolutions such as 480p, 720p or 1080i since component does not support 1080p. Hope that helps : )


Sony BRAVIA... | Answered on Jul 25, 2011

If you can see the screen iluminate I wouldn't assume the panel has failed. It seems that your video sources are not being decoded and then shown. I would suspect the mainboard (aka tuner board) to be having problems. It may not be getting the proper voltage needed from the power supply. When repairing, start simple and that is ALWAYS the power supply FIRST...then other components second.

Hope this helps, please rate.

Sony BRAVIA... | Answered on Apr 19, 2011

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