Hi,
Please follow these steps to get your external monitor working:
Open up the Display Properties (Right click on the desktop and select Properties) and go to the Settings Tab.
Click the Advanced... button and then go into the SiS tab.
Once you are here, make sure your monitor is hooked up, plugged in, and turned on. Click the Detect Monitor button. Then, check that the truck icon on the right is all on one screen rather than stretched over two. Now, select 1440 x 900, 32 bit color from the drop down list. Click OK. The display should turn off for a second and then the external monitor should turn on.
BTW I have moved you to the laptops forum. You shouldn't need a VBIOS upgrade. If the resolution does not appear on the list, you can use this little program called power strip. It is shareware, but it is free for the first 30 days. If you decide to buy it, it is $30.
http://www.pcworld.com/downloads/fil...scription.html
Post if this helps. Good luck!