A while back, my Acer XP screen cracked. I looked it up and was able to connect it to a different monitor by using the command: Fn then pressing F5 three times. It worked for the last few months, but Yesterday I accidentally hit the power cord of the monitor and it switched back to the laptop. I tried the command again but this time it didn't work! Is there another command or something I could do to connect my laptop to the other monitor?