Device Hub can’t reach the printer / printer shows offline

Check that Device Hub is running, the printer is powered and connected, and review the heartbeat status.

Each printer reports a heartbeat to the Print Center. If the heartbeat stops, the printer shows offline and jobs queue up instead of printing. The fix is usually physical: power, cable, or the Hub app itself.

1. On the warehouse PC, confirm Device Hub is running (relaunch it if it was closed).
2. Check the printer: power on, paper/ribbon loaded, USB or network cable firmly connected.
3. In Print Center → print devices, check the printer’s last-seen time. If it stays offline after the checks above, re-pair the Hub and contact support.