HP Designjet 1050c Inkjet Printer suddenly malfunctioned
Error 04Cxxx (04C300 00240000) in HP printer is an EIO Accessories error or an error related to the EIO Card/Hard Disk Drive of the printer. If you encounter this error, try this. Press Enter then turn off the printer.
If the hard disk drive of the printer is installed, remove it then make sure the EIO card is installed correctly by pushing it inwards firmly then check the two installation screws if they are tight. After this, turn on the printer then see if this works. If this doesn’t work and the error still appears, you need to replace the EIO card.
But if it works, turn off the printer and install the hard disk back then make sure again the installation screws are tight. Turn on the printer then check if the error comes back.