When you get the printer validation failed HP problem, it typically signifies that something is blocking the printer. There's also a possibility that the carriage is not moving freely. You may troubleshoot the problem in a many different ways. To begin, dissociate all of your widgets and restart them. The error might arise as a result of a recent software upgrade or a power loss. Misaligned motorists for Windows can beget of this issue. However, you can communicate us, If you're unable to resolve the issue.