When faced with a Print Quality problem, use the following checklist as a guide in troubleshooting the problem:

Problem reproduction
Reproduce the problem that the customer is seeing using their original settings.

Printer configuration
Print Mode: Set to Best (in the driver).
Dry time: Set to Automatic.
Select the correct media setting when loading the media.

Hardware check list
Firmware Revision
Check if the latest version of the firmware is installed. If not update the Printer with the latest firmware revision.

Printheads
Printhead Troubleshooting Process
If you don't have any samples yet, reproduce the original problem with the correct printer settings.
Perform the Troubleshooting procedure using the exact settings and Media that the Customer used when faced with the Print Quality problem.
Printhead Alignment and Check
Perform the Printhead Alignment using HP High-Gloss Photo Paper. If not available, use Coated media if required.

Media
Make sure that you use HP or HP-approved media.
Select the correct media type through the front-panel when loading it.

Driver print quality configuration:
To clarify if the reason of the problem is related with the print mode defined with the Non-HP Driver try the following:
Print the same sample using the Non-HP driver and their normal media.
Print one of the internal demos using HP Media and configuring the Printer as indicated previously.
If the output obtained using the HP Solution is good and the one obtained through the 3rd party solution is bad, HP support organization should communicate to the customer that the problem is not in the Printer and that he should address it through the 3rd party vendor support structure.

Service Accuracy Calibration
Perform "Service Accuracy calibration" using HP High-Gloss Photo Paper.

WARNING: Do NOT use any other type of media apart from HP High Gloss Photo Paper or Bright White InkJet Paper when performing the Accuracy Calibration.