Ps4 disk drive fail

Hello, my ps4 slim signals that there is a disk in a disc drive but its not, can you tell me more about smd detection sensors(insert eject media sensors) there is 3 sensors on kmd board! Ty

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Are the arms retracted when a disc is not inside? Do the arms move freely?

Yes, the KLD-00X board houses the intake/eject motor as well as 3 switches. You can test them for physical function as well as using a meter to test their electrical function. Or you can swap the board altogether (all 1200/Slim/Pro boards are interchangeable regardless of part number).

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