crwdns2934241:0crwdne2934241:0 C.D.

crwdns2934249:0crwdne2934249:0:

Some laptops require you to hold down the FN button on your keyboard to use the functions assigned to those keys, like brightness. Try holding down FN while pressing F2 or F3.

crwdns2915684:0crwdne2915684:0:

open