UC4 disc "not found"
I bought Uncharted 4 on release, on disc. It worked fine, and I played through and completed it.
Approx 6 months later, following some updates I went to play it again, and got the error code: CE-34878-0.
I assumed this was an error with my system, went through all the troubleshooting advice, but nothing worked.
Note that all other games functioned during this time. I rebuilt databases, and completed all logical troubleshooting steps.
I gave up and after a year or so, replaced my hard disc drive.
Since I replaced my hard disc drive, I have put the disc back in and initially (after a fresh install) it said "the disc cannot be read, please eject it".
I downloaded all the updates and now the disc doesn't even read in the PS4.
I have rebuilt the database again, despite this being a fresh install. I have tested 40 other games with no issues.
The disc was simply stored in its box, on my bookshelf, along with all the other games that still work.
Can Naughty Dog please confirm if they will replace the disc, issue a code for a download version, or have an update planned to fix this issue?
If other game discs work ok, then the issue has to be with the disc itself.
In bright daylight or in a very well lit room; check it for scratches (or other physical damage) and dust, dirt, finger smudges or other foreign material that doesn't belong on a disc.....
....or just clean it anyway using a cleaning kit or use home remedies that can be found on youtube or similar sites.
Update to this: I've monitored the behaviour for a couple of days. With the disc in, it doesn't register as present 80% of the time. However its clearly still attempting access as other functions are very slow; for example Notifications load blank.
When you try to restart the PS4 with the disc in, it fails to restart and crashes, resulting in a soft rebuild.
On the rare occasions the disc loads; it will boot to the flash screen of ND standing in the forest looking down, you'll hear the disc cycle noisily a few times and then you go back to the error "disc could not be read".