A scan-to-computer button can fail even when the scanner itself works. Test scanning from the computer first to separate the scanner connection from the printer-panel shortcut.
Prove the scanner path
Open the official scan app on the computer and try a small preview. If that fails, check USB or network connection, the exact model and scanner software. If it works, the problem is likely the button-to-computer registration or service.
Check the destination
Confirm that the computer is awake, on the same trusted LAN and selected as the scan destination. A renamed computer or changed network can break a saved shortcut. Use the manufacturer's model-specific scan-to-computer setup to refresh it.
Keep security intact
Do not switch off the firewall broadly or expose scanner services to a public network. On a managed PC, ask IT to check the approved discovery and application rules.
Official references
Useful next steps
Found a mismatch? Request a correction with the public source URL and exact model, without passwords or full serial numbers.