HP 68xx Printers - 'Problem with printhead' Error
HP Officejet 6812
HP Officejet 6815
HP Officejet 6820
HP Officejet Pro 6230
HP Officejet Pro 6830
HP Officejet Pro 6835
There is a problem with the printhead error message displays on the printer control panel or computer. The error might include an error code that begins with 0xc19.
Figure : 'Problem with printhead' error message

This error indicates a hardware failure, and the printer requires service or replacement.
Your printer model might be replaced under the following conditions:
The printer is one of the models listed above.
The printer exhibits the error message: There is a problem with the printhead.
The printer is within two years of the original purchase date.
If your printer is replaced:
You receive a replacement printer that is the same or equivalent to the defective printer.
When filling out your order, use a physical mailing address. HP cannot ship to a P.O. Box.
Upon completion of your order, you receive immediate confirmation and a follow-up email that contains the order number and case identification number.
You can check repair status online using your order number or product serial number.
Delivery is usually within 3-5 business days of order placement/processing.
If you are located in the United States or Canada, your printer meets these conditions, and you would like to see if your printer can be serviced or replaced by HP, visit the Product Replacement for Printhead website.