sounds like they are split, so
- create copy of front and back ends in another location that is a Trusted Location
- open the new fe and go to linked table manager
- relink all currently linked tables between the new fe and new be
- carefully examine all linked table paths by checking that property in the nav pane
As an additional precaution, perhaps
- make small inconspicuous edit(s) and close new db go to production version and ensure that change is not there
If during linking you are prompted for the location every time, use notepad to create the entire path string and copy/paste from there.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.