No picture in lcd screen

[fbj1973]

Hello,all..just wondering if somebody could help me with my Dell D620..
The laptop is working fine ,the only thing is that there is no video signal coming out in the lcd screen..But if i connect an external monitor using the vga output,it's ok.
Im pretty sure it's not the lcd screen or the converter,because i've just replaced it with another working lcd screen from the other d620 that i have..
Is this a problem in the video card?
Thanks..

 

[scoobylee]

no as your getting a output to an external monitor its very unlikely to be video card...
in my honest opion it could be either invertor or the lcd connector ribbon cable...