Hi,
I have not come across this issue before and thought it was worth an ask to see if anybody else has seen it. The PS4 boots fine to dashboard but if you try to load a game (downloaded or from disk) the screen goes black and nothing else happens.
Thanks,
Owen
Im not entirely sure if this is the same on ps4 as it is on ps3, but if the disc drives daughterboard is not working properly then neither disc or digital games will work. That might not be the issue, but its the only thing I could think of