Giúp em cài Vga Nvidia Gefore 8400 GS ?

Tình hình là sau khi cài lại win mình dow drive trên mạng về cài nhưng nó bị lỗi. đọc hướng dẫn trên mạng thì thấy đúng là nó bị lỗi này.đọc mà hok hiểu sữa làm sao hết, ai hướng dẫn giùm mình cách làm với..thank các pác nhiều....
Screen Blanks/Monitor Turns Off
Using a laptop with a GeForce Go card, or connecting the sole display via DVI on a dual-head system sometimes results in the screen not receiving a picture. This is caused by the driver outputting video to the VGA port on the graphics card, instead of DVI.

The usual hint that you have this problem is when you hear the startup sound but nothing appears on the screen. If you do not hear any sound, you are more than likely experiencing unrelated problems.

This is a launchpad bug about displays on digital outputs being blank when using NVIDIA binary driver, and can be resolved by editing your /etc/X11/xorg.conf file:

Switch to the console (Try using ctrl+alt+F1, or reboot and select recovery mode from the GRUB menu.)
Use your text editor to open /etc/X11/xorg.conf. (try sudo nano /etc/X11/xorg.conf)
Find the line that says Section "Screen"
Insert a new line that says Option "UseDisplayDevice" "DFP".
Save the file. If you had to restart into recovery mode, type reboot, otherwise restart your display using sudo /etc/init.d/gdm restart.