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Questions & Answers
How can we fix our Sony Bravia TV
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.
on Aug 18, 2014
My klv-s40a10 tv turns on
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.
on Mar 01, 2013
What is b board panel
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.
on Dec 15, 2011
Sony bravia model no.klv40a10 sound
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.
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.
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...
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.
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: PartStore
on Sep 14, 2011
I have a Sony KLV-S40A10
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.
on Apr 19, 2011
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