Okay guys ill try to make this short. I bought a 46in sony from a pawn shop.. I knew it wasn't working but got it cheap.. I plugged it in nothing happened no led light no nothing so first I looked for the schematics and found out the mainboard was defected so I found one put it in and it turned on for bout 5 sec backlight came on. Then all of a sudden it shut down and the standby light started blinking twice.. So I looked at the schematic it say 2 blinks mean its a OVP(overage voltage protection)problem. From my knowledge ovp has to do with the power ic in the power board so I changed the power ic nothing happen so I just decided to buy another power board and still nothing happen im getting frustrated.. when I bought the mainboard I knew it needs a firmware update I have it on a usb stick but cant get the tv to turn on to recognize it...Guys I have 2 power boards and 2 mainboards (in this tv its a G board and a B board ) I do believe the power board is fine I think its a firmware problem but I cant get it to recognize the usb please help anybody
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sony bravio kdl-46ex723
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Re: sony bravio kdl-46ex723
what happens when you unplug the Tcon board and power up?Proud owner of dozens of broken TV's and many,many,many boards.
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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