56 Parallel port <x> disabled
<x> is the number of the parallel port. Try one or more of the following:
•Press the arrow buttons until 
Continue appears, and then press 
to clear the message. The printer discards any data received through the parallel port.
•Make sure the Parallel Buffer menu item is not set to Disabled.
56 Serial port <x> disabled
<x> is the number of the serial port. Try one or more of the following:
•Press the arrow buttons until 
Continue appears, and then press 
to clear the message. The printer discards any data received through the serial port.
•Make sure the Serial Buffer menu item is not set to Disabled.
56 Standard parallel port disabled
Try one or more of the following:
•Press the arrow buttons until 
Continue appears, and then press 
to clear the message. The printer discards any data received through the parallel port.
•Make sure the Parallel Buffer menu item is not set to Disabled.
56 Standard USB port disabled
Try one or more of the following:
•Press the arrow buttons until 
Continue appears, and then press 
to clear the message. The printer discards any data received through the USB port.
•Make sure the USB Buffer menu item is not set to Disabled.
57 Configuration change, some held jobs were not restored
Since the time the jobs were stored on the printer hard disk something has changed in the printer to invalidate the held jobs. Possible changes include:
•The printer firmware has been updated.
•Paper input, output, or duplex options needed for the print job were removed.
•The print job was created using data from a device in the USB port and the device is no longer in the port.
•The printer hard disk contains jobs that were stored while installed in a different printer model.
Press the arrow buttons until 
Continue appears, and then press 
to clear the message.
Understanding printer messages
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