BluRay drive is connected to the motherboard with 2 cables, a fex cable and a 4 or 5 wire cable.
The 4/5 wire is providing power to the drive.
Usually, with only the 4/5 wire cable connected, the drive should be able to accept a disk.
Visually check this cable for any damage (wire cut, pin getting out of the connector, ...)
Also check the connector solders on the motherboard if you feel you pulled too hard on it.
Another possible culprit is the narrow flex cable connecting the 2 boards of the drive. This is responsible of giving power to the eject motor and sending gears positions to the main board.
Testing the continuity from connector to connector (while the tiny flex cable is still in place) with a Ohm-meter would be a good option.
If everything is fine, verify that the big flex cable, that links the drive to the motherboard, still has its 2 lock bolts on each side (4 total).
If the locks are damaged, that means you didn't press the metallic tab on the connector before pulling the flex. A flex replacement is mandatory (other solutions like taping the flex to the motherboard would be only temporary).
Then check if the tracks of the flex cable has been damaged (bended/folded/pinched too hard)
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