Sony KDL40BX450 40" 1080p LCD TV KDL-40BX450 / KDL40BX450 Logo
donna fathke Posted on Dec 13, 2012
Answered by a Fixya Expert

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Sony KDL-40bx450 no sound

I bought this unit last spring, but it has less than 20 hours viewing time on it. I turned it on the other day, The picture is fine, but I get not sound. I have muted/unmuted, played with the sound, unplugged it, reset i,t etc. to no avail.

1 Answer

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  • Sony Master 14,553 Answers
  • Posted on Dec 13, 2012
Anonymous
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Two things to do:

First see if you have sound with a DVD etc connected to a rear input.

Second look in the menu to make sure speakers not switched off or to external

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Feb 20, 2009

SOURCE: Sony KDL-40V3000 standby blinks 13 times.

A service technician arrived at my home this morning and infromed me that 13 blinks indicates a bad LCD panel. His quote to repair it was approximately $500 more than the TV initially cost. I contacted Sony support directly, and they have agreed to replace the TV, since it is less than 30 days out of warranty. The KDL40V3000 has apparently been dicontinued so they are replacing with a KDL40V4100(factory reconditioned). I know this won't necessarily help others with the same problem, but if your warranty ended recently enough they will probably work with you to mitigate the expense.

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Anonymous

  • 86 Answers
  • Posted on Mar 25, 2009

SOURCE: Sony Bravia KDL 46", no picture, standby light blinks 4 times

Since the TV is still receiving power, the problem is going to be with the TV's mainboard.  After you unplugged the TV and plugged it back in, you said the power light went out again, so I assume the standby light wasn't flashing again?  The flashing standby light is indicating an error code so my suggestion is to contact Sony for service options regardless if there is a warranty or not because service is the only solution to this situation.  Don't forget to provide them the error code or 4 flashes repeating.

Anonymous

  • 106 Answers
  • Posted on Jun 16, 2009

SOURCE: light flashing 13 times on sony bravia KDL-46x3100

It sounds like an Intergrated Circuit (IC) has fried. Even on a good day, this is not something you can attack at home. As a tech (and as an owner of that model samsung), I'd need a map & tools to know what's going on. Your best bet in this situation is to contact Samsung and let them recommend an authorized service center in your area. Sorry I can't be of more help, but this is a rather serious problem.

Anonymous

  • 157 Answers
  • Posted on Nov 09, 2009

SOURCE: My Bravia KDL-40S4100 lost all 3 of it's HDMI

There is a problem with the processor. The only way to resolve this issue is to replace the main board. It is called the A board in your TV.

There are two for this model and the correct one will depend on what your serial number is.

Part numbers are as follows:
part # 185709211 for Serial #
1,000,001 - 1,350,000
1,700,001 - 1,750,000
1,800,001 - 1,804,270
1,804,271 - 1,818,372
1,818,373 - 1,830,000
list price: $504.87 core charge: $680.00

part # 185709231 for all other serial numbers
list price: $505.87 core charge: $600.00

Testimonial: "Thanks, Now I wonder who all shares the same problem and if Sony is willing to do something about their defective products..."

Anonymous

  • 1 Answer
  • Posted on Aug 05, 2010

SOURCE: sony bravia kdl 46s4100 no picture

it sounds like your back light might be going out. You might be able to fix this by installing a new backlight inverter board.

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CAN YOU DIRECT ME TO EITHER THE INVERTER BOARD OR THE MAIN BOARD.

Hello Calvin,
I would suggest to change the input to a video with audio source to eliminate a main board failure.
If the back lights are not working, this could indicate that the inverter board is defective but there could also be a defective CCFL light failure.
You can find service parts in the link provided.
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Light flashing 13 times on sony bravia KDL-46x3100

It sounds like an Intergrated Circuit (IC) has fried. Even on a good day, this is not something you can attack at home. As a tech (and as an owner of that model samsung), I'd need a map & tools to know what's going on. Your best bet in this situation is to contact Samsung and let them recommend an authorized service center in your area. Sorry I can't be of more help, but this is a rather serious problem.
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