HP Designjet 4000 Service Manual - Page 50
If the System Error continues, perform the Media Drive Diagnostic
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System Error Codes System Error: 72:04 Problem Description: Generic Firmware error. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version. System Error: 73:03 Problem Description: Servo Error. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version. Perform the "Scan-Axis" Diagnostic (⇒ Page 4-7) to further troubleshoot the error code. If the System Error continues, perform the "Media Drive" Diagnostic (⇒ Page 4-12) to further troubleshoot the error code. System Error: 74:00 Problem Description: Failed getting Part Number/Serial Number. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version. System Error: 74:01 Problem Description: Error uploading firmware update file. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Resend the firmware update file to the Printer. 2-20 hp designjet 4000 series printer service manual