Camera not working (green light blinking)

Did you pull the wires out of the cable end connector or did you pull the logic board connector off?

Sadly, the cable end connector is a molded on connector so when you pulled the wires out you can’t reconnect them to the connector. The only thing you can do is replace the entire cable unit but I’ll warn you it’s not easy! As you first need to remove the display assembly following this guide MacBook Pro 15" Retina Display Late 2013 Display Assembly Replacement and then you need to carefully lift off the display panel out of the shell. We don’t have a guide to do that but here a peak on what it looks like MacBook Pro Retina Display Teardown jumping to Step 10 we can see the full cable unit which needs to be replaced, and lastly the part TheBookYard UK - Macbook Pro 15" Hinge - Right Antenna/iSight Cable (L13-15)