Sony vaio ux180p vista does not detect external monitor

Hi,

I bought a new tablet PC

sony vaio ux 180p
Os: Vista business 32 bit
ram:1014 mb
processor: intel(r) core (TM) solo cpu 1.33 Ghz
graphics: mobile intel (R) 945 gm express chipset family

I connected my tablet pc to a regular external desktop monitor
using VGA cord.

HCL
OS: Win xp SP 2
intel(R) premium (R) 4 cpu 1.50 ghz
display: plug and play intel(r) 82845G/GL

Siince vista did not recognize the output device automatically as soon as it was connected, Using the "Windows Mobility Center" application I clicked
the "connect display" button but happened. It showed "display connected" and "connected". but nothing came up on monitor.

I clicked on the "connect display" button again from the Windows
Mobility Center -> Detecting -> pop up options for "how do you want to
use the external display" again. I was provided with three options
1. External display only
2. Mirrored.
3. Extend to external display.

Tried all the three options but nothing happened. So i am trying to figure this thing out. Is it something to do with drivers. I dunno. I am trying to figure this thing out. Any help would be much appreciated.

there is a possibility that the monitor also needs a driver. you can check by typing device manager in search. go to the display tab and make sure there is you video card and external monitor. The monitor needs to be connected at the time.