Make sure that the engine controller PCA is correctly installed. If the messages persists, install another HP print cartridge. Inspect the high-voltage contact on the print cartridge and in the printcartridge cavity to make sure that they are not damaged. Verify that the print cartridge is correctly installed. Make sure that the sealing tape on the print cartridge has been removed. This message appears if the print cartridge's antenna is unable to detect the high-voltage bias. At start up or when the top cover is closed, a high-voltage bias is placed on the print cartridge's developer roller. Description: The product checks for the presence of a print cartridge at start up and anytime the top cover is closed.Make sure that the two connectors from the engine control PCA to the switch are securely installed on the switch contacts. Determine if SW301 closes when the door closes. Remove the left cover, and then open and close the cartridge door. Description: Opening the cartridge door opens the cartridge door switch (SW301) and disables the +24 V to the high-voltage contacts on the print cartridges.

1 hp laserjet p2055dn printer