When I open my lid, the screen does not come on instantly like it should. Instead, the screen comes on 5-6 seconds later. And at times there is a white screen before showing the desktop. I did a reset on SMC, NVRAM, and PRAM, but that didn't seem to help. And I've repaired the disk permissions and disk. Sometimes, when I open the lid, I hear a sound like a mount sound when the desktop shows. I have installed all updates from the App Store. And sometimes the screen just comes on instantly when I have the lid halfway open. But most of the time, when I open the lid, the screen shows up much later. Are these issues caused by a hardware problem? I am still in the 14 day return period.