hello...
the Dell XPS L502x ( Model P11F ) [ DAGM6CMB8D0 rev.D ..3 of lines output LVDS from PCH has short ohm(0 -70) than LCD displat turn ON but is white !!!
i decide to change LVDS ports to Lcd from EXT_LCD graphic Studio Discrete to No need it LVDS lines of PCH use...
according to ΩSchematic ,I changed any resistor and... Config_0 and Config_1 EC...but:
1- EXT_LCD_PWM no voltage to enable pwm
2-EXT_LVDS_VDDEN no High to Enable LCD_vcc
and screen is turn off and fan is high Speed!!
Question:
I need to Use Discrete graphic nvidia EXT_LCD ports...