Question about Vizio Televison & Video
Replaced Power Supply board, Main Board, Tcon Board and ribbon cables to and from Tcon board and cable harnesses from Power supply board to Main board. Same result. No Picture, Backlights on, Audio works. Checked voltage on ribbon from Main to Tcon and 12.5 volts on both ends at solder point 1 and solder point 51, respectively. No voltage to ribbons leaving Tcon board either side. Checked Gate and Drain and Source on Tcon Board and 0 volts. Any ideas now? or did I get sent a bad Tcon Board.
If you see the back light, then you should have 24vdc on the main power supply board which it gets the turn on command from the maun board. If you do have all those voltage, then it does sound like you need the new main board.
Posted on Nov 25, 2009
LCD simple panel check. In a dark room, (does not have to be total), shine a flashlight at it with a station tuned in. If you see images
and you have changed the panel HV board, your flourescent tubes could be bad. If you dont, then check the cabling.
Posted on Jan 03, 2015
Testimonial: "The back lights are on just video on the panel tv turns on and off as it should just not picture."
SOURCE: bn44-00666a led voltages
Posted on Apr 12, 2016
Testimonial: "Thanks for the reference but I couldn't find anything specific to this power board and the voltages I need. Still looking...."
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