Dell 3130cn Service Manual page 96

Reference_1:
1. Make sure that the printer is connected to the computer via USB port or Parallel port (remove the
network cable). Then, try downloading as follows:
1) Power on the printer while pressing the <X Cancel> and < > buttons.
2) Press < > button to select "F/W Download DL Mode Parallel" or "F/W Download DL Mode
USB", and then press < > button.
3) The printer goes into the Download Mode with a message "Download Mode Ready. Then,
activate firmware update tool and follow the instruction displayed.
While the firmware download is being executed, the printer displays a message
"Writing...... F/W", and the computer displays a progress bar and may be restarted
during the downloading process. Never power off the printer or the computer until
the downloading process completes, and never interrupt the downloading pro-
cess.
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Chapter 1 Troubleshooting