Unless it wasn’t unlinked. Unless every Samsung display shipped in the last six months contained a hidden calibration layer—a biometric backdoor designed to identify users not by fingerprint or face, but by the unique way their eyes process RGB subpixels .
For home users who never enabled any accounting features, the error usually indicates a firmware bug or memory corruption. A hard reset or firmware downgrade is your best bet. For businesses, consider migrating away from legacy Samsung printers if the PPI system continues to malfunction. invalid ppi samsung