My mom has a Pavilion dm3 and I remember the keyboard would light up. How do I turn on the backlit keyboard?

Cothte,

One of the keys on the Keyboard, has three dots in a horizontal row, (... ), with three lines that look like light rays, shooting out of the corner of the left dot.

Indication is that it may be the F5 key, or F12 key, or a key that does not serve any other function.

After pressing said key, press and hold down on the Fn key, and at the same time push on the spacebar.

Regards,
joecoolvette