Two problems, PS4 ejected discs and now wont turn on

SOURCE: System wont load or eject any discs...

Remove the disc drive from the console. Remove the cover very carefull. Take the top part off (remove the 5 screws) and open the disc drive like a book.
Carefull remove the guide mechanism (the front part -1 screw).
The clicking noise is caused by the fact that the left side mechanism that raises and loweres the deck when the disk is inserted or ejected is stuck. Carefull push back the piece of plastic with teeth located on the left side of the deck (as you are looking at the disk drive the oposite side with the lens driving motor) until it clears complete the plastic round gear that drives that part.
mount back the guide mechanism, and the top part.
Attached the ribbon cables to the unit , power the console and keep the eject button pushed for about 10-15 seconds.
That will reset all the gears and stuff.
Worked for me when I experienced that issue.

SOURCE: PS3 Blu Ray Drive won't eject

try a blu ray reset all you do is power the system off by button on front not the switch on back the hold the eject button for 15 to 30 seconds if this does not work then ether you gears are out of line of they are too worn