This is a digital display manufactured by Honeywell and recently overhauled in 2012. The unit appears in good condition. It has not been tested. The unit is likely to indicate the WX (Weather) radar display and the various functions allow the pilot to adjust the map range and information shown.
These types of unit are common across a variety of early digital era aircraft including the B737. The panel has a cannon plug connector on the back. Any attempts to electronically restore this unit it at your own risk.