My PS4 beeps 2 times when switched on?

Mi
- in PlayStation
2

I just switched on my ps4 and now it beeps about every 30 seconds. It beeps twice and then you hear a hissing sound from the drive for the CD. I have already watched, so far there's no CD inside. Then wanted to try to make one, but didn't go as if one was already in the lauwerk…

what could that be?

Ki

Just on the edge:

It's called on, not on.

No offense.

Mi

Thanks for nothing