Cause of error code 40 EIO x BAD TRANSMISSION
The connection has been broken between the printer and the EIO card in the specified slot. (Data loss might occur in this situation.)
Solution for error code 40 EIO x BAD TRANSMISSION
1. Press GO to clear the error message and continue printing. 2. Reseat the EIO card in slot corresponding to [X]. 3. Check cabling. 4. Replace the network card if needed. 5. Try a different software driver.