I thought I had successfully installed Windows XP on my Mac through Boot Camp when it restarted the computer in order to finalise the installation.
However the problem is that I can't boot neither into OS X nor into Windows.
I've tried restarting the computer and holding down Option / F1 / X / V / C and I don't get anything except for a blank white screen. The arrow moves around after holding down the Option key, but no menu appears.