Bought a used one to replace my local panel which has a cloudy lcd display. Plugged in today but I cannot enter into any of the settings. Both the "menu" button and "<" ">" buttons do the same thing which is browsing the menus. The "+" and "-" keys do nothing. The "Filter" button works fine to turn on and off the bump.
It feels like the local key pad is limited to access the settins.
Any idea how to fix this? Many thanks.

It feels like the local key pad is limited to access the settins.
Any idea how to fix this? Many thanks.
