While HP has purged many legacy manuals, you can sometimes find them via the "HP Customer Support - Manuals" archive using the product number . Search specifically for "Service and Support Guide."
According to the manual's Section 3 (Troubleshooting), you run a "Hardware Error Test" by holding the Resume button while powering on. The LEDs flash a pattern. You decode this to Error 0x0B: "Paper path sensor flag stuck." hp officejet pro k8600 service manual new
These often contain corrupted or incomplete copies that will leave you stranded halfway through a repair. While HP has purged many legacy manuals, you
: The HP Support Setup Page provides step-by-step videos for unpacking, loading paper, and initial hardware setup. hp officejet pro k8600 service manual new
For a "new" setup or to refresh your current configuration, initial physical installation is the first step.