I can't switch to the external monitor!
After pressing the Fn+F3 doesn't appear on the graphic card advanced options the option to activate the external monitor, as it used!
I opened the laptop to clean the dust from the heat sinks, but I'm not sure if I messed up because of that, since I only use the external monitor once on a while...
I changed video drivers, reinstalled Win XP, and nothing worked
Any suggestions???