Topic: Ps4 slim disk drive

Hello, i recently bought a used ps4 slim off of ebay, I'm a newbie to the slim version. As i turned the console on it was making this eject noise in 2 cycles, though there wasn't a disk. I inserted a disk to see if there's anything wrong, it took the disk and installed the game, so i thought the noise was just normal. After i ejected it, it kept doing that eject noise in a cycle of 4, but it did let the disk out on the first eject request. So i later then tried putting in a disk, now it doesn't take a disk, just keeps making that eject noise in a cycle of 2 when eject button is pressed. Everything else works fine. If anyone knows how to fix this problem, can you assist me thanks!