If you PM me your email address, I can send you a codeplug that I have for my 880 that works as far as scanning, displaying data on the LCD, and button functions.
Since SCN is showing up on the display while scanning, it doesn't sound like an LCD issue. It sounds like you may need to take a look at how the display is configured in the RSS. the
As far as your buttons, have you checked the key assignment feature to see what keys are assigned to which buttons? Its possible to not assign a function to a button.