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I-tech model maya2640w

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WILLYAM1:
Hi to all.
by opereting somtimes the logo is apear  but no pic no osd backlight ok all volltage from p.s ok(mlt666).
signals to lvds cable seems to be ok by pressing menu can see in lvds cable the changing in the signal.
and somtime no logo and the blue color seems to be fade away slowly.
when heating the board screen(back)that atach to tcon board pic apear.
i disasemble the screen didnt see somthing unusule.
not sure if tcon board problem or screen.+(tcon 260b1-co1_.
any advice?.
willyam

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