Seiko 5 LE Sarada issue with crown and second hands

I was about to close a deal yesterday for a Boruto Themed Sarada Seiko 5 release. To my surprise, the crown is found protruding and not going to regular position. Winding it feels no resistance at all. Later found the open back case not screwed and fell stuck to my hand luckily I grab and it didn’t fell down. I really love the watch but I am not interested in paying more for another movement to replace it. So far after checking the watch looks original matches seiko 5 release description. My question is this repairable or does it need total replacement of movement? No visible damages except for minor scratches. No box nor warranty.