|Not enough info yields no significant help.|
Apparently this is not a standard computer, strickly speaking.
Datalogic Falcon 320 Portable Data Terminal formerly PSC Falcon 320 Portable Data Terminal
Datalogic Falcon 320 & 325 Portable Data Terminal Specifications
We do not normally get questions about this type of device.
Try searching the web, using PSC Falcon 320
Falcon PSC 320.
Try contacting customer support here:
Parts and manuals here:
PSC Falcon 320 Flat Rate Repair Service
If you need it for work, you're probably going to have to borrow or rent one that is working. Does your employer have spares ? If not, can you rent one locally?
Did you drop it ?