I have a customer who has a few CDK (HP) M608 and CDK (HP) M553 printers. These printers have CDK info embedded in the firmware or software so it only wants the CDK brand toners and won't accept the HP toners. I have tried changing the settings for supplies, but still no help. Does anyone have any other options or a way to get the original HP firmware (other than the current firmware listed on the HP site)?
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