Hope someone can help. I have a older KSU KX TA 624 system with several KX-TD7896 phones installed. One of them I cannot access the function menu, which apparently is available only in standby mode when I can't get to. Specifically it won't even allow access and it not available when you toggle the joystick. I think this is because os come setting on the phone but for the life of me I cannot figure out how to undo it.
This is the only mode it stays in (note left toggle not available)
https://goo.gl/photos/yzSKVsBJUWL93orF6
