V70 Mk1 (year 2000).
 

Expert help please. My V70 locking system works fine using the key, all buttons and locks work as expected. The remote fob and drivers door switch for locking works ok but the drivers door button pops up and down but the outer handle remains locked and wont open the drivers door without using the key. Any suggestions before I remove the internal door panel for what I should be looking for would be appreciated.
Many thanks, B+M.