sony vaio vpcf115fm disply problem

[DNA2683]

I replaced my Sony VAIO vpcf115fm motherboard (M930 main board 1P-009BJ00-8012 REV 1.2 MBX-215)
I bought the motherboard from this page:
**broken link removed**

but I am having a problem, I don't get any image on my laptop screen even on starup I don't see nothing (even the vaio logo),
I can get an image only if I connect an external display via VGA port but I can see the boot and evrething on the external screen only.the laptop display doesn't show nothing.
I tried to play with the FN+F7 keys to choose display but it don't effect nothing...
It looks thet the laptop do not know that the original laptop screen connected.

things i tried:
1. enter to boot -but there's no option of choosing screen.
2. play with the FN+F7 keys to choose display but it don't effect nothing...

I read online that maybe I need to update the video BIOS and ill need to "tell" the chipset that is a screen (the laptop screen) conected to hes ports


There is a setup that I need to do for a new motherboard?
how i can fix my problem?

please help

 

[fredd]

probably the lcd display connector is also defective?

 

[chickmazta]

Assuming you have the exact model. check the connectors on the lvds section which includes the flex cable to lcd screen. You might have shorted something.

 

[hessa11]

It is hardware problem. You need to change the lcd screen.