ET-470
(430-0571) Troubleshooting Faxback Doc. # 17182
Q: Does not respond to base other than sounding three beeps.
A: Remove AC from base for more than 30 seconds. Disconnect battery from
handset and return handset to base with battery disconnected. Then
reconnect battery in handset and AC to base. Wait for about 30
seconds and lift handset. If unit still fails to operate, send it to
service.