could you have a message in answering machine or 1471/1571?
have you tried switching base of for 10 min and then turn back on?
Does it stop beeping when when you put it on charge or maybe when you take it off the charger or does it beep regardless of whether it is charging or not?
Set the message alert on or off
1. Select Menu, Answer Phone is displayed, press OK.
2. Press Calls until Answer settings is displayed,
3. Answer and record is displayed , press OK.
4. Press Calls to display Message alert and press OK.
Then press Vol or Calls to display On or Off and
press OK. Saved will be displayed