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Backlight failure, what solution p!ease

Red light standby light blinking 4 times

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Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. 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 inverter board as card basis.
http://electronicshelponline.blogspot.com/

Posted on Dec 09, 2014

Testimonial: "Thank you for this info, will check into repair cost, TV only 6 years old. Kind regards Josie Monroe"

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Pn43d490 clicks blinks red light twice and will not turn on


do you have a dim screen? if you put a torch to the screen at an angle can you see the picture?if so this means the backlight is out, it could be the inverter board or the bulbs themselves though this is unlikely.do you get the 24Vgoing to the backlight from the psu?

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Sony KLV-46S200A LCD TV doesn't turn on, it remains blank with the red standby lighthouse blinking 4 times.


According to the service manual page 6. four flashes is "Backlight Trouble" so if its the light it self or Backlight Inverter Board i cannot tell you.

Service manual can be downloadet here.
http://elektrotanya.com/sony_klv-26s200a_klv-32s200a_klv-40s200a_klv-46s200a_chassis_wax2.pdf/download.html

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Power standby red light blinks 4 times. Can I fix


If your television is a dlp set, yes you can. More than likely it is your bulb that is problem.

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1 Answer

How to FIX


Televisions have protection circuits which prevent full power-on if a fault is detected in a high voltage/high current circuit such as the backlight inverter.

Some googling on 'Sony Blink Codes' found that 4 blinks is 'backlight failure'. A common failure in LCD displays is the backlight inverter board which is a transformer similar in function to a fluorescent light ballast, as the backlights are fluorescent lamps.

If the screen color is getting pinkish/reddish, that's a sign that one or more of the lamps themselves are going bad.

Since multiple lamps are connected to (typically) two inverter boards (a primary and secondary board), I am fairly certain that the blink code refers to a failed inverter board and not a failed lamp.

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1 Answer

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1 Answer

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4 blinks is bad backlight inverter. Download the service manual here:

http://rapidshare.com/files/208591107/KDL40S2000_L5_sm.pdf

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1 Answer

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Hi there,

4 blinks on a Sony Bravia indicates a backlight/inverter (aka ballast) problem. These ballasts are regrettably only available with an entire LCD panel. :( You may perchance be able to find a parts outfitter online that scraps out TVs and have a used ballast.

Typical backlight problem on an LCD shows up as the screen lighting up for a second or two and going back off. The 4 blinks just confirms your problem.

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

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try some of the solutions on this link hope one will work for you. http://www.docs.sony.com/release/KDL32S20L1.pdf look under troubleshooting for no picture good luck

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