Yes, the scanner must be connected to the computer correctly in order for it to work properly. Most scanners will plug into a USB port on the computer, while some may require connecting with an ethernet cable. It is also important to ensure that any necessary drivers or software have been downloaded and installed on the computer before connecting the scanner. Additionally, it is sometimes necessary to restart the computer after successfully connecting the scanner. Once connected, the user should open the program or application associated with the scanner, and follow the onscreen instructions for scanning documents.