PS4 Problems

For Christmas, I got a PS4. It worked well on Christmas day (then I had to stop playing for a while). Today I booted up Call of Duty Black Ops III after starting a download for Star Wars Battlefront, the PS4 froze. Like any other person I restarted it, or so I thought. It didn't turn off so I had to turn off by pulling the plug. Here is some advice for any of you purchasing a PS4, make sure it doesn't show the blue line of death; if so, check if everything is in order, then if it is but the blue line of death is still there, return it. From the time I've played on the PS4 so far, it is really good, graphically and gameplay wise. Tomorrow, I am returning my PS4 at Target and buying a new PS4; later on, I will go to GameStop to buy Sword Art Online: Lost Song as well as another controller for the PS4. Wish me luck!