I tried updating my geforce gtx 550 ti to the latest display drivers on the nvidia website and now my monitor isn't displaying anything. I had previously been using the driver that was automatically loaded by window vista 32bit and after loading the new driver my screen went blank, monitor went into sleep mode, and after waiting for 10 minutes I restarted the computer, which did nothing. Now I can't see the screen to fix the problem or rollback the drivers, anyone know what to do?
Remove the discrete card and see if you can use the integrated video, if you have integrated. If you get a display, see if you can get into windows to uninstall the Nvidia driver. If not, try booting to safe mode.