Serious problem

Yesterday I bought a new TFT display, connected it to my laptop, set the settings in laptop so, that only the new display works and the laptop display stays always off.

Today I installed some drivers for my graphic card and then without rebooting accidentally installed another drivers (for graphic card too). After rebooting both screens are black… Laptop screen doesnt show anything, but the windows is running (I can hear sounds from it).

Anyone knows the solution? Any help would be appreciated as I cant do anything with my comp…

Computer is – Toshiba Satego P100-10U
Graphic Card – Geforce go 7900 gs