I had exactly the same problem with an external 5,25" drive some weeks ago when I went through a batch of old disks.
That small box became loose and the drive had problems with reading disks and positioning the head.
I thought about re-fitting the part, but after I moved the head carefully a bit back and forth the drive was able to read my disks again, not to write = format them though.
I decided to keep it that way to get a backup of my data and "trash" the drive afterwards. Will give it to a german guy who collects demos/intros for kestra.exotica.org.uk so he can go through all my disks and get interesting things out of them.
PS. You have to upload the pictures to some webserver, otherwise only you can see them because the are read from your local disk.
