Hello Michael and a very warm welcome to Beoworld.
If your Beocom 6000's are about 5 years old it could be a Mark I or Mark II version as that was about the time of the changeover. A Mark I has a black DOT at the 9'O Clock position on the dial and a Mark II has the letters INT
You issue with the address book is almost certainly caused by the fact that the phones have a facility to use either a PERSONAL or COMMON address book and I expect you have the phone set to personal.
I am taking a guess that your Beocom 6000's are the Mark I version and to change the address book from personla to common you need to do the following:-
- Press DOT then MENU
- Press 7 to display the handset/base menu
- Turn wheel to find PERSONAL or COMMON
- Press OK
With regards to the second phone, is it actually turned on ? Press the centre button for at least 5 seconds or until it comes on.
If that fails, then either the battery is faulty or the phone has another fault.