PS4 won't take disks in.. replaced drive but still not fixed

Could be so many things. Here check this out, different model but maybe a similar problem.

https://www.youtube.com/watch?v=wKr34J-v...

Because if it were bad rollers there’d at least be the mechanical noise of the unit trying to accept the disc. But if nothing at all happens and it feels like the disc is hitting a wall when you try to insert it…the above might be why. This tends to happen it seems when people are impatient and don’t let the disc fully naturally eject. Meaning as soon as enough of it is out to grab they yank it out the rest of the way. Which causes the ps4 to think a disc is still in the drive and so it puts that barrier up.

If you re-used the old ribbon cables you might want to check those for damage. Visually inspect, but also run a continuity test on each set of pads on the ribbon cables.