Bootcamp cannot find both systems at startup Something strange happened: 


I closed my macbook pro while using windows 10
When I opened it again it didn't wake up for a while so I forced it to shut down by pressing the power button for 10 seconds
When I restarted the computer, it could not find any OS and just displayed a flashing question mark. I tried starting the computer while pressing the usual special keys, but nothing worked.
I gave up and went for 2 days of vacations, instead of being angry.
I just came back from vacations (after two days) and everything works fine. 


Update

Today nothing works, it is impossible to find the SSD, even when I try OS X Recovery over the Internet Disk  Utility does not find the SSD (just a drive of about 1.28 Go where the OS X recovery is installed). I tried reseting the NVRAM and the SMC without any luck.

Is it necessarily a disk failure?

Update 2

It's not a disk failure since I installed my SSD into a friend's Macbook Pro (same model: retina 15" late 2013, 2.3Ghz) and it works properly. I also tried to insert his SSD into my Macbook Pro and it is not recognized.

I returned my computer to an Apple reseller...
Author of the question answering:

It's not necessarily a disk failure since I installed my SSD into a friend's Macbook Pro (same model: retina 15" late 2013, 2.3Ghz) and it works properly. I also tried to insert his SSD into my Macbook Pro and it is not recognized.

I don't know where it comes from though...