Panasonic KX-TG4023N Operating Instructions Manual page 38

Useful Information
Problem
The unit does not work.
I cannot hear a dial tone.
Programmable settings
Problem
The display is in a
language I cannot read.
I cannot register a handset
to a base unit.
Battery recharge
Problem
The handset beeps and/or
7 flashes.
I fully charged the
batteries, but 7 still
flashes or the operating
time seems to be shorter.
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Cause/solution
L Make sure the batteries are installed correctly
(page 10).
L Fully charge the batteries (page 10).
L Check the connections (page 10).
L Unplug the base unit's AC adaptor to reset the
unit. Reconnect the adaptor and try again.
L The handset has not been registered to the base
unit. Register the handset (page 23).
L The base unit's AC adaptor or telephone line cord
is not connected. Check the connections.
L Disconnect the base unit from the telephone line
and connect the line to a known working
telephone. If the working telephone operates
properly, contact our service personnel to have the
unit repaired. If the working telephone does not
operate properly, contact your service provider/
telephone company.
Cause/solution
L Change the display language (page 13).
L The maximum number of handsets (6) is already
registered to the base unit. Cancel unused
handset registrations from the base unit (page 23).
Cause/solution
L Battery charge is low. Fully charge the batteries
(page 10).
L Clean the battery ends (S, T) and the charge
contacts with a dry cloth and charge again.
L It is time to replace the batteries (page 10).