![background image](https://i.printerdoc.net/HP Officejet 4500/en/HP Officejet 4500_en019.png)
Critical error messages
Critical error messages inform you of a device failure. Some of these messages can be
cleared by pressing the Power button to turn off the device, and then turning it on again.
If a critical error persists, service is required. For more information, see
Solve a
problem
.