Hello All. Lakeith Standfield here. My profession is that of a technician. The majority of clients ask me how to solve the 'Printer validation failed HP error.' This may be caused because there may not be any form of connection between the PC and the printer. To fix the issue, launch the Printer Troubleshooter on PC. Use the search box to type precise troubleshooting queries. Else, in the Settings option, go to Troubleshoot settings. Select Run this troubleshooter after clicking on the Printer. Select the printer you wish to troubleshoot.