HP DesignJet T / Z Series I/O / Communications Service may be required

HP Wide-Format Printer Troubleshooting

HP DesignJet T/Z Error 65:YZ – Memory Driver Internal I/O error, I/O Socket Manager Internal I/O…

Memory Driver Internal I/O error, I/O Socket Manager Internal I/O error, communications error.

Applicable models
T510T520T610T620T1100T1120T120T1200T1300T770T790T920 +19 more

What error 65:YZ means

Error 65:YZ on HP DesignJet T/Z indicates Memory Driver Internal I/O error, I/O Socket Manager Internal I/O error, communications error. The source places this code in the I/O / Communications area.

Start here

What you can check first

  1. Switch the Power OFF from the back of the Printer and disconnect the Power cord.
  2. Reconnect the power cord and power On the Printer.
  3. Check that the Printer has the latest Firmware version.
  4. If not, update the Firmware to the latest version.

When to call for service

If the error comes back

If error 65:YZ 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.

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