Got my PS4 on launch day. It worked good but would freeze making me hard-reset it. One day after hard resetting it would no longer boot. I got the Blue Light Of Death. It would blink blue but the system would never boot.
I contacted Sony via chat and they had me remove my hard drive, reboot, and re-insert my hard drive but I still had the same problem. They told me I would have to send it in. Two days later a box was delivered via Fed Ex. I shipped my PS4 back to them in this box. Two more days and I received a working PS4. In addition Sony updated PS4 with a new os release that is more stable.
Everything is working now. My PS4 is running great. Looks like they got it together. Good news.