Try the following:
1. Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer.
2. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version.
3. Perform the Scan Axis Test to troubleshoot the problem further
4.If the System Error continues, perform the Media Drive diagnostic test to troubleshoot the problem further.