Acer Aspire 3680 Laptop "accidentally dimmed screen black" Questions

accidentally cured the problem Underneath the laptop monitor, on the far right of the r/h hinge, there is a small lever that shuts down the computer when the monitor is closed I was prodding this with

...accidentally hit a button on my laptop, and all of a sudden my screen went dim..I thought it must of just hit the brightness buttons on my keyboard but when I went to go turn it back up nothing ...

...screen display has accidentally been toggled over to an external display. Hold the Fn key down, tap the F5 key once. No? Then it's time to get technical. The following is not designed to confuse you, ...