Hi everybody
mbx-239 works well and vga output is ok but there is no image on screen (black screen) .
Voltages that feed lcd manually wired but no action .
I think lcd can not detect and my question is which one of pch or gpu is responsible for lcd detecting in this platform.
(lcd_clk & lcd_dat)
There is no schematic unfortunately.

Edid clck and data and lvds goes from PCH. Try to press pch, or connect another lcd. And check voltages on lvds connector.