Error Code 40 EIO
The connection has been broken between the printer and the EIO card in the specila slot.(Data loss might occur in thuis situation.) (1) Press GO to clear the error message and continue printing. (2) Reset the EIO card in slot [x].
Replace the JetDirect card (probably the 615N). These fail on a regular basis. The replacement units hold up well but the cost is high for a nic.
The new machines have a much improved nic and I have yet to replace one.