Printer is getting error message 40 and 41 as well as EIO Error

How to fix EIO Error HP LaserJet 4250 eio slot options include two EIO slots Internal Wireless connectivity card IEEE1284-compliant parallel, 1 open EIO slot; HP Jetdirect print best slot machine strategy Loosen the two screws from the EIO card, and then remove the EIO card from the EIO slot Install the new EIO card in the EIO slot and tighten the screws

slot demo pg soft caishen wins EIO Menu The EIO Menu appears only when an EIO device is installed in an EIO slot on the printer