tscheucher
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Dec 9, 2012, 6:27 PM
Post #2 of 3
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Re: [indnracn2] vizio xvt473sv mainboard problem
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Hello indnracn2...
That problem doesn't necessarily belong to a bulged or leaking capacitor. It semms to be issued by no operating voltage at the display driver board. Have you done measures on that board?
Close to the lvds connector (on display board) you can find a smd type print fuse. Is there a 5V or 3,3V voltage present? If not check the fuse.
When the fuse is ok - 5V Source is not revealed on digital board.
Mostly caused by a no more switching mosfet. Follow the tracks of the pcb from the lvds (display connection to mainboard) connector on the main board to it's main processor. Somewhere in between those lines is the location of the "on/off mosfet" for the t-con (display driver) voltage. It's a smd type with 8 leads.
When the set is on, check for voltage on it's source pin/gate pin and drain pin (voltage output to lcd driver). If gate voltage and source voltage is ok but no drain voltage - Replace the mosfet.
good luck
(This post was edited by tscheucher on Dec 9, 2012, 6:34 PM)
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