Question about Sony Bravia Kdl-55ex720 55" 3d 1080p Led Lcd Hdtv

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Sony KDL 55EX720 Turns on for 2 second then 4 blinking lights

Hi I have a 55 inch TV that turns on for only 2 seconds and then turns off again, then will show the four blinking red lights. I replaced the main board and still has the same problem. Reading this I see it may be the power supply board but I don't really understand the terms used to check if that's it. Please help Im desperate! Thank you

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: When first attempting to turn

Thanks for your support with my situation. I read many people's complaining about having a red light blinking 4 times in the Pwr. display. It was recommended I blow out the fan for the bulb. I did just that and it did solve the problem, at least for now.
The fan kicked on which allowed the Tv to power up.
I am guessing this is a common issue and made sense that the fan was stuck with dust.

I can't thank your site enough for this valuable information. Spending 4k and already having one unit replaced with what was a factory inherent problem and then going down so quickly was very upsetting.

I am hopeful it will work for now on.

Randy Winters

Posted on Jul 21, 2008

redhead7377
  • 51 Answers

SOURCE: Four blinking red lights.

you can have the inverter board replaced...instead of the entire panel.
KDL 40S2010: inverter part # 178950032, you will also need 2 spacers..part # 289765511
you're looking @ 200-300$ for the inverter and 5-10$ a piece for the spacers.

KDL-46V2500: inverter part # A1251295B
you're looking @ around 500-600 $ for the part

Posted on Sep 09, 2008

mistersony
  • 320 Answers

SOURCE: Four blinking red lights.

Either on of the backlight inverter boards is bad or a backlight has failed inside the panel.

Posted on Oct 18, 2008

  • 58 Answers

SOURCE: Four blinking red lights.

the error code is triggered by the inverter fuses, which blow when the inverter fails

Posted on Dec 06, 2008

  • 17 Answers

SOURCE: Sony PSP 'headphone with remote control' problem

2 things you can try. first is to use another headphone to see if the problem still happens. If it does then either the Jack is bad or the Jack needs to be resoldered. Sony is famous for having cold solder connections especially with User type controls or plugs.

Posted on Dec 20, 2008

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HAd been working fine turned it off came back later turned it on e light comes on blinks 14 times. unplugged it hoping for a reset. no.


Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.

Dec 31, 2015 | Televison & Video

1 Answer

Sony bravia kdl55hx729 3d led tv turns on 3 seconds shows picture than four red flashes


Hello,
the error light sequence that you are seeing is indicating a "backlight error". Most likely you have a bad inverter board -the board that powers up the back-lights behind the display panel. They might be available via ebay if you are a DIYer, or you need to call for sony service.
Good Luck!
Rich Lilja

Dec 07, 2013 | Sony Bravia KDL-55HX729 LED Internet TV...

1 Answer

NO POWER


Need to know how many times the led is blinking.

Try this link for more informationmessage_type_solution.png

Re: tv kdl-55ex620 red light blink 8 times Do a Power Reset. 1. While the TV is off, unplug the power cord of the TV from the electrical outlet. 2. Let the TV remain without power for 60 seconds. 3. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.) 4. Turn on the TV. 5. When the TV powers on and a picture is displayed, reset the TV to factory default settings.
  • If the Reset message does not appear and the TV turns off and on, begin again from step 5.
  • If the standby light begins blinking eight times, return to step 1.
6. After the Reset message appears, allow the TV to reset. Do not press any buttons on the remote control or on the TV and do not make any other adjustments for 1 minute. 7. Unplug the power cord from the electrical outlet. 8. Allow the TV to remain without power for 10 seconds. 9. Plug the power cord back into the electrical outlet. 10. Turn on the TV.
  • The initial setup screen displays if the above procedures were performed correctly.
11. Follow the on-screen instructions to complete the initial set up. 12. Perform a system software (firmware) update.

Sep 04, 2012 | Sony KDL55EX620 55 inch BRAVIA 1080p LED...

1 Answer

Has verticle lines and turns off.


SONY LCD TV 32 inch, Display problems. Display half white colour.

Jan 20, 2012 | Sony KDL-32M3000 32 in. LCD Television

1 Answer

Sony Bravia 46" The standby light flashes four


Hi,
If tv model number is KDL-46S2000 then 4 times blinking standby light indicates back light failure problem in your tv.
Check/ replace back light inverter boards to solve its problem.
Thanks.

Dec 29, 2010 | Sony BRAVIA KDL-46S2000 46 in. LCD HDTV

1 Answer

Sony KDL-46s2010 4 red light blinks


I would suspect one or more of the miniature flourescent backlight lamps. One way to confirm this would be to power up the set with a grayscale image at 40 to 60 IRE. If one or more lamps is failing to light, a slightly darker horizontal area in the grayscale will give it away. Unfortunately, Sony will not supply any of the backlight components apart from a new LCD panel. Sorry.

Sep 01, 2009 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

1 Answer

KDL-40XBR3 turns itself off; STANDBY light flashes 9 times


sony 52 inch tv in stand by mode comes on and off on its own

Jun 01, 2009 | Sony BRAVIA KDL-40XBR3 40 in. LCD HDTV

3 Answers

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.

Mar 25, 2009 | Sony BRAVIA KDL-46S2000 46 in. LCD HDTV

1 Answer

Sony Bravia turns off by itself


Replace the BU Mount pcb. Sometimes they are called the FB pcb.

Jan 08, 2009 | Sony BRAVIA KDL-40S2010 40 in. LCD...

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