1. Check that your printer is powered and turned on.
2. Check if the printer is connected to the same Wi-Fi network as your phone or tablet.
3. Ensure that the printer driver is up to date.
4. Restart your printer and your device.
5. Check the printer settings to make sure the printer is correctly configured.
6. Check the paper level in your printer and ensure paper is not jammed.
7. If none of these solutions solve the problem, contact the printer manufacturer for further assistance.