While you wait for answers, we may have found some information which could help you.
Click here for Lock Password PhonePanasonic cordless phone malfunctioning?
Get display back on my panasonic portable phone?
panasonic kx-tga400b?
how to reset panasonic kx tga 551e?
How can I fix the handset display on the KX-TG5633?
how to add a synergy 2150 handset to a Panasonic KX-TG8120E base unit?