Question about Sony KV-36XBR450 36" TV

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I have a Sony model KDL40V4100, 40" TV. I have sound on all chanenels but no picture on any channnel. Verizon FIOS is my cable carreir. That system is working fine on all other TV sets in the house so is not at fault. Seems like this maybe a common occurance and if so, what is the fix. The TV was purchased in Jan 2009. and this is the first problem I've had.

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  • rch1943 Sep 08, 2011

    The backlight module and 24V power supply both are functional. The fix was as follows and exactrly as written on my service bill. Hope this helps you in the future (also note I"m not charging $15). ""Replace T-con module, part no,, 2275E and replace open CKT protector on the main module".

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Hi,
There is problem with the back light of your tv. In LCD tvs CCFL are used as back light to give light to independant pixels.There will be 12 over more CCFL labs behind the lcd screen to provide the brightness. CCLF lamps required high voltage to light. This high voltage is provided by the inverter board inside the tv. If any one of the chopper transformer (high voltage transformer) have some problem then the inverter will shuts off itself preventing damges to the power supply.

You have to check the 24V from the power supply. If its ok the you have to check the inverter board.if avilabe replace the same. if you are not able to do the same i will prefer to consult some one experienced in it. Back light inverter board will look like one in the picture.



I have a Sony model - ajin_g_76.jpg ok

Posted on Sep 04, 2011

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