20 Most Recent Sony KDL40EX400 40 in. HD-Ready TV Questions & Answers

In most of the case, the problem is a LED back lights strip problem.

hi,
u can enjoy full hd 1080p video through only ur tv inputs as 2 component video and 2 HDMI. the tv is seted to receive videos up to the resolution 1080p automatically (need not have any setting). just check the output of ur cable box or BD player, is it outputs full hd. if u are using the tvs internal tuner u will only get 480p.

ok

Hi there, there are many such on ebay

My TV did the same thing. According to Sony the Bulb or lighting mechanism is bad when 6 red lights blink and your TV fails to turn itself on properly. If you have a warranty they'll likely replace the television set as they said "it isn't cost efficient to fix this issue."

If you have tried using different input devices, looked for loose contactsin power outlet, RC Jack, cable and connectors, the TV might need service.

Main Power Over Voltage Protection PLEASE CHECK MAIN POWER SUPPLY BECAUSE THERE IS A PROBLUM IN POWER SUPPLY BOARD

How many times do this stand by light blinks at one time switch ON? Count it. These blinks are fault indications. From these number of blinks, you can get an idea about the faulty circuit section inside the TV. http://electronicshelponline.blogspot.com/ If you wish to get more details about the blinking codes to Sony TVs check this link. Pull up older posts by its left side bar, or see it in Timeslide view.

Yes - just be careful with the ribbon cables. You are going to be replacing the LCD portion - behind it is the backlight assembly. Some may come with the entire assembly in one. You may need to do a little research to get a replacement - use Google to find a distributor.

Some basic information is needed:Does power light on set come on at all?The more you tell me the better I can help---I am standing by.

At some point you have to cut your losses, this is the reason I suggest getting an extended warranty with coverage (including the maker) of 3 years, 80 of the 140 sets in our shop are less than 3 years old, if this set had that they would have to fix or replace the set----One reason I choose to answer your question (I do this here for free) is this set ought to have a error buffer, when set fails it will count the event and that also indicates where the issue is.Most of the Sony sets for the last decade with set off and using the Sony remote: Display, 5, vol down, and POWER will if set comes on bring up a display with a number of shortened items listed----they should all if the set has this be a zero. Any with a number indicates a issue and the number indicates the number of times this event has happened.

Check battery on your remote. If you have opened the set and know that the sensor is not working, check whether it is getting voltage at one pin. If it does, you can replace sensor and try.

There is no reset switch, try unplugging it for about an hour to let it reset itself, if that still does not work, then you have more serious problem. I would have it fixed under warranty since it is less than a year old.

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

If I understand what you mean, is it that the picture is there but very dark? if so it sounds like a problem with your backlight or inverter. I believe either one of these parts failing would produce the problem you have described.