When your printer is not working and not showing any error on the control panel. Simply check some condition and follow these steps:
1. If the device has connected through wired medium then check the connection properly.
2. If your device has connected through wireless medium then check Wi-Fi is enabled or not and your device is connected to your Wi-Fi or not.
3. Check printer driver and software has installed or not on your computer.
4. Sometimes the driver has corrupted and you need to re-install your system.
5. Restart your device.
After restart, your device will work properly. If problems remain the same, contact HP Printer Technical Support team at 1-800-296-1402.