This process is typically required when the printer shows "Replace Toner" or "Toner Empty" even though the cartridge still has toner, or after refilling a cartridge. Samsung (now owned by HP) released firmware updates that block third-party or refilled cartridges. To reset toner levels, you must downgrade to an older version of the firmware (version V3.00.01.35 or earlier).
This process is typically required when the printer shows "Replace Toner" or "Toner Empty" even though the cartridge still has toner, or after refilling a cartridge. Samsung (now owned by HP) released firmware updates that block third-party or refilled cartridges. To reset toner levels, you must downgrade to an older version of the firmware (version V3.00.01.35 or earlier).
