hello, i have dell laptop latitude D620 with a problem of VGA (blank display) i throughly check from service center he told me that your laptop VGA not working properly first time he treat with heatsink to the VGA, its working normal but after some time laptop come in previous sate (blank screen) know i want a good segestion what can i do for serviceable of my laptop send me your segestion on my mail address syed_nauman9@yahoo.com