Is not necessary to see anything, I flhased once muy VGA without viewing anything 
 
Here are the steps:
1 Download 
this file
2 Unrar to a floppy disk
3 Start computer with floppy disk as first boot device
4 Wait about 60 seconds
5 Type 
nvflash.exe -4 -5 -6 6600.rom (Press 
this key for type the -)
6 Wait about 40 seconds
7 Press 
Y key.
8 Wait about 30 seconds until you hear a bip
9 Press again 
Y
10 Wait about 30 secondos
And you can restart your computer, the card is now flashed. 
You can try it if you want, yo don´t loose anything 
 
PD: If you don´t understand anything I can explain it in Spanish 

PD: If you can´t configure the motherboard BIOS for starting system from floppy disk, you can reset it by removing the battery for about 15 minutes.