My imac screen is suddenly very dim, I have it set to 100%
but it is so dim. It's only 2 months old, is there a way I can check if there is a problem with the backlight?
Can I run the hardware test for that?
27-inch iMac 266GHz quad-core Intel Core i5 - 8 gigs of RAM
iPhone 6 plus - ipad air 2 gold - AppleTV3