55 Unsupported option in slot [x]
1 Turn the printer off.
2 Unplug the power cord from the wall outlet.
3 Remove the unsupported option card from the printer system board, and then replace it with a supported card.
4 Connect the power cord to a properly grounded electrical outlet.
5 Turn the printer back on.
56 Parallel port [x] disabled
Try one or more of the following:
• Select Continue to clear the message. For non‑touch‑screen printer models, press to confirm.
The printer discards any data received through the parallel port.
• Make sure the Parallel Buffer menu is not set to Disabled.
56 Serial port [x] disabled
Try one or more of the following:
• Select Continue to clear the message. For non‑touch‑screen printer models, press to confirm.
The printer discards any data received through the serial port.
• Make sure the Serial Buffer menu is not set to Disabled.
56 Standard USB port disabled
Try one or more of the following:
• Select Continue to clear the message. For non‑touch‑screen printer models, press to confirm.
The printer discards any data received through the USB port.
• Make sure the USB Buffer menu is not set to Disabled.
56 USB port [x] disabled
Try one or more of the following:
• Select Continue to clear the message. For non‑touch‑screen printer models, press to confirm.
The printer discards any data received through the USB port.
• Make sure the USB Buffer menu is not set to Disabled.
Troubleshooting 224
