Satellite c855 - VGA port suddenly not working

Hi people
I've got the toshiba-satellite c855-17c. windows 7.
I usually work on my laptop and a monitor, which i use by plugging in the vga cable. I've been using that set up for more than a year and never have any problem.
Now, nothing happens when i plug in the cable. i checked with another laptop and the screen does appear on the monitor - so it seems the problem comes from my laptop.
Would you have any idea why this happened and the solution to this problem?
Thanks,
Ben.

Hmm very strange
I dont know why this happened but you could try following steps:
1) go to BIOS and set it to default settings (F9)
2) uninstall the graphic card driver (in device manager -> graphic card -> uninstall driver)
3) after the GPU driver has been uninstalled, reboot the notebook and install the display driver which you could download from the Toshiba EU driver page
4) shut down the unit
5) remove battery and AC adaptor. Press and hold power button 30 sec long. Put the battery in and connect AC adaptor and power up the unit.
Good luck

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