Initially a big scare; everything is connected, I turn and no display. An internet forum advised me to turn off my TV, the ps4 then relight everything: ditto. The light of ps4 is white (so everything is supposed to be OK). I restarts in safe mode and the display arrives; I go into the menus and I come out, still no display. Reboot again in SAFE mode; I spend ps4 version 1.51 with a USB drive and reboot; still no display. Finally after going through the menus in safe mode and choosing 'Initialize', the ps4 rebooted and the display has arrived. I configured and I just spent two hours on AC4 without problems.
If others have had this concern, I hope my review will help ...
In the end I'm not disappointed at start despite a big scare.