I have a Sony Vaio VGN-TXN25N Laptop, it has a Mobile Intel 945 Express Chipset Onboard Video Card. I recently installed Windows 7 and now the VGA Out is not working. Under the Screen Resolution settings 2 displays are showing, but no image shows up on the External Monitor. I know the monitor and cable are working properly. I have tries Fn+ F7, I have also tries (Windows Key) + P and nothing...any Ideas?