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For assistance, please visit http://www.panasonic.com/help
Troubleshooting
If you still have difficulties after following the instructions in this section, disconnect
the base unit’s AC adaptor, then reconnect the base unit’s AC adaptor. Remove the
batteries from the handset, and then insert the batteries into the handset again.
General use
*1 KX-TG6421 series: page 3
Programmable settings
Problem Cause/solution
The unit does not work. L Make sure the batteries are installed correctly
(page 9).
L Fully charge the batteries (page 9).
L Check the connections (page 9).
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 26).
I cannot hear a dial tone. L The base unit’s AC adaptor or telephone line
cord is not connected. Check the connections.
L If you are using a splitter to connect the unit,
remove the splitter and connect the unit to the
wall jack directly. If the unit operates properly,
check the splitter.
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.
The indicator on the
handset flashes slowly.
L New messages have been recorded. Listen to
the new messages (page 33).
*1
L New voice mail messages have been recorded.
Listen to the new voice mail messages (page
38).
Problem Cause/solution
I have changed the display
language to a language I
cannot read.
L Change the display language (page 13).
TG640x(e).book Page 43 Wednesday, November 26, 2008 2:33 PM