I take it this is a new laptop and not working. It's a warranty issue and as such you use what applies to how new. If just a day or so old you take it back to the store for a working model. If outside the exchange date, you call the maker for a fix or repair.
Hello, I've use the keyboard shortcut FN + F9 to raise up my laptop's volume for about a year, I could also lure down brightness FN + F6 raise up brightness FN + F7 and lure down volume FN + F8.
Recently, I've only been able to lure down my volume, all other keyboard shortcuts won't work, I did a keyboard tester to check if these keys were broken, but It said that they worked. I use these a lot when watching youtube vids with different volumes, and when my battery is low, does anyone know what the problem is, I changed my keyboard region in the settings but it didn't fix it.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic