I had to warranty replace a print head the other day so I thought I’d record the steps so it was easier to find them in the future and hopefully help someone else.

800.204.6344
>3 Latex
>1 Technical Issues
>1 300 Series
>1 In warranty

The prompts may be different for you, but hopefully, the number will get you where you need to go to submit any warranty claims on your HP Latex printer.