99 Altima Door latch problems

If you can get the door open, you should be able to pull the interior panel off with a flat-head screwdriver. Once inside, peel the plastic back (noise, moisture barrier, so try to keep it intact). Then you'll have to use your hands for eyes, There should be a metal rod from the door handle to the lock box, with a single plastic clip (maybe metal) on the door handle to keep the bugger from coming off. In some cases the rod may be bent, so when you pull the handle the rod bends instead of opening the door. If you feel absolutely no resistance when using the outside handle, then most likely the rod has come off of it. Another possibility is that the handle eyelet has broken, in which case you will need a new door handle.