You just installed a freshly refilled toner cartridge, but your computer screen or printer LCD display persists with: "Toner Low" or refuses to print altogether.

The Smart Chip Explanation

Modern toner cartridges feature a tiny smart chip that acts as a digital page counter. Once it logs the cartridge's rated page capacity, it permanently registers it as depleted.

How to Clear It:

• HP/Canon (Monochrome 12A/88A): Dismiss the driver warning on your PC; the printer will print normally.
• Brother Laser Printers: Brother uses physical reset gears or front-panel button combinations (e.g., press the Go button 5 times with the cover open) to reset the internal counter to 100%.