Why wont my optical drive not accept disc?

I replaced my optical drive but my optical drive will not accept disc. I purchased the console used with the original drive not working at all. I purchased the correct replacement drive. But when I installed the replacement drive it does nothing. All the wires are connected firmly in place. Also I have repaired the data base and reset the console but nothing it's like the drive is dead. The previous disc when I got it was dead I took it apart and seen the white connector rod was out of place. But I believe they're may be something related to power but not for sure. I can try to insert disc with it in rest mode and the console powers on but will not accept the disc. Any ideas on what this issue is and how to fix it. Thanks