Board Uniwill P75/55
Detachable Nvidia 8600 card.
As title say,but with external monitor works fine.
Internal display completly dead,not even 3.3V power.

During POST if I insist few times on Fn+F10 (switch between internal-external monitor) I get internal display powered.
Now there is 3.3V on LVDS connector CCFL start,brightness adjust works too.
But on display I see only this.
Is not my photo but is identical.

Measured some voltage on LVDS .
External monitor active,internal inactive.
V EDID and EDID signals are 3.3V ,LVDS data pins have each 0,2V there is no 3.3V for LCD power.
That seems fine.

External monitor inactive,internal active.
V EDID and EDID signals and LCD power are 3.3V That seems fine too.
But on LVDS data pins 8 to 18 (except 10,13,16 which are GND) there is 2.1V and rest of them are all 0V. That's bad.

Since in inactive state I get 0.2V and in active state 0V I think is not related to cracked balls under GPU for LVDS pins.

Some advice are welcome.

Connect the other matrix. Blow air 300°С on the chip 10sec.

By matrix you say LCD display?
Already tried ,same result.

Like I said this is not my photo,I found it on the net.But simptom are identical.
Same image,identical,show on internal display.

I'll try to reflow video card.

Heat up the chip the hair dryer 280-300 With 10-Sec and look, most likely, the chip under replacement.....