Printer shows as offline

Clear any error on the printer's screen, such as a jam or empty cartridge, and check it's on the same Wi-Fi network as your PC. Turn it off, unplug it for 30 seconds, plug it back in, then restart the PC.

Go to Settings > Bluetooth & devices > Printers & scanners (Windows 10: Settings > Devices > Printers & scanners), select the printer and choose Open print queue. Cancel old jobs, and if there's a Printer menu, untick Use Printer Offline and Pause Printing.

Select Start, type cmd, choose Run as administrator and run the command below. Both parts should report success; then try printing again.

Note the IP address on the printer's network configuration page. On the printer's page, open Printer properties > Ports; if the ticked port shows an old address, click Configure Port and enter the new one.

If the ticked port starts with WSD, click Add Port > Standard TCP/IP Port > New Port, enter the IP address and tick the new port. If it then prints but still says offline, untick SNMP Status Enabled under Configure Port.

Restart the printer and the Mac. Open System Settings > Printers & Scanners, select the printer, click Printer Queue and click Resume if it's shown.

Open Terminal and run the command below. Idle or enabled means the printer is ready; disabled means its queue is paused.

Select the printer, click Remove Printer, then click Add Printer, Scanner, or Fax and choose AirPrint in the Use menu. If it isn't listed, add it on the IP tab.

As a last resort, Control-click in the printer list and choose Reset printing system. It removes every printer and job, so add your printer again afterwards.

Select the time at the bottom right and check you're on the same Wi-Fi network as the printer.

Restart the printer and the Chromebook, press Ctrl + P and look for the printer under Destination.

Open Settings, search for Printers, remove the printer with the three-dot menu next to it, then save it again or add it by IP address.

Your phone only sees printers on the same Wi-Fi network. Check the network name and turn off any VPN app.

Restart the printer, wait until it's ready, then restart the phone. On iPhone, a No AirPrint Printers Found message often clears after this.

On Android, update your print service or the printer maker's app from Google Play. On iPhone, keep iOS up to date.