HP Wide-Format Printer Troubleshooting
HP DesignJet T850/T950 Error 0721-0078 – PMK maintenance needed
PMK maintenance needed
Applicable models
T850T950
What error 0721-0078 means
Error 0721-0078 on HP DesignJet T850/T950 indicates PMK maintenance needed. The source places this code in the Numerical error codes area.
Start here
What you can check first
- The supplied source does not document a customer-level corrective procedure for this exact code.
- Record error 0721-0078 and the printer model before changing settings or replacing parts.
- If the printer remains in an error state, use the LCR service request so the exact code is included with the request.
When to call for service
If the error comes back
If error 0721-0078 remains after the customer-level checks above, the supplied source directs the user to service or support. Send LCR the exact code and printer model so the service request can be triaged with the error information attached.
When you contact LCR, include the exact error code, printer model, what happened immediately before the error, and whether it returns after a restart.