Sprint 1930c Owner's Manual page 41

IN CASE OF DIFFICULTY
COMMON CURE FOR ELECTRONIC
EQUIPMENT
Electronics, like people, can sometimes
get confused. If the unit does not seem
to be responding normally, then try
putting the handset in the cradle. If
it does not seem to respond after trying
this a few times, do the following (in
the order listed):
1. Disconnect the power to the base.
2. Disconnect the handset battery.
3. Wait a few minutes.
4. Connect power to the base.
5. Connect the handset battery.
6. Put the handset in the base.
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