Troubleshooting - Panasonic KX-TGH720E Operating Instructions Manual

Troubleshooting

If you still have difficulties after following the instructions in this section, disconnect the base unit's
AC adaptor and turn off the handset, then reconnect the base unit's AC adaptor and turn on the
handset.
General use
Problem
The handset does not turn
on even after installing
charged batteries.
The unit does not work.
The handset display is
blank or dark.
I cannot hear a dial tone.
The base unit beeps.
The handset display
begins operating
automatically.
Error sound is heard when
I press some keys on
base unit.
Helpline Tel. No.: U.K. 0344 844 3899 Ireland 01289 8333
Cause/solution
R Place the handset on the base unit or charger to turn on the
handset.
R Make sure the batteries are installed correctly (page 10).
R Fully charge the batteries (page 11).
R Check the connections (page 10).
R Unplug the base unit's AC adaptor to reset the unit and turn off
the handset. Reconnect the adaptor, turn on the handset and
try again.
R The handset has not been registered to the base unit. Register
the handset (page 38).
R The handset is in screen saver mode (page 15). Activate the
handset display again by:
– pressing MCN when on a call.
– pressing any dial key at all other times.
R "LCD in charging" is set to "Off" while on charge.
Change the setting (page 31).
R The handset is not turned on. Turn the power on (page 14).
R Make sure that you are using the supplied telephone line cord.
Your old telephone line cord may have a different wiring
configuration.
R The base unit's AC adaptor or telephone line cord is not
connected. Check the connections.
R 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 phone service provider.
R New messages have been recorded. Listen to the new
messages (page 43).
R Demonstration mode is activated. To turn off demonstration
mode:
M N a MMENUN #899 a MbN: "Off" a MOKN
R Automated call block is being screened. Try again later.
Useful Information
51