Useful Information44TroubleshootingIf you still have difficulties after following the instructions in this section, disconnectthe base unit’s AC adaptor, then reconnect the base unit’s AC adaptor. Remove thebatteries from the handset, and then insert the batteries into the handset again.General use*1 KX-TG6421/KX-TG6431 series: page 3Programmable settingsProblem Cause/solutionThe 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 theunit. Reconnect the adaptor and try again.L The handset has not been registered to the baseunit. Register the handset (page 26).I cannot hear a dial tone. L The base unit’s AC adaptor or telephone linecord 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 thewall jack directly. If the unit operates properly,check the splitter.L Disconnect the base unit from the telephone lineand connect the line to a known workingtelephone. If the working telephone operatesproperly, contact our service personnel to havethe unit repaired. If the working telephone doesnot operate properly, contact your serviceprovider/telephone company.The indicator on the handsetflashes slowly.L New messages have been recorded. Listen tothe new messages (page 34). *1L New Voice Mail messages have been recorded.Listen to the new Voice Mail messages (page39).Problem Cause/solutionI have changed the displaylanguage to a language Icannot read.L Change the display language (page 13).TG64xxC(e).book Page 44 Monday, December 22, 2008 4:02 PM