HP LaserJet printers are designed to monitor the amount of toner remaining in each cartridge. When the printer senses that the toner cartridge is running low, it will refuse to print until the printer owner changes the cartridge. Unfortunately, the chip that monitors the amount of remaining toner does not always convey accurate information. If you physically check the toner and find that there is plenty remaining, resetting the toner chip will allow you to continue printing until the toner is truly too low.
Instructions:
1.Turn your HP printer off. Hold the "Go" button in, then turn the printer back on.
2. Wait until the LED lights flash once and then turn off. Press the white "Toner" button while continuing to hold the "Go" button down.
3. Release the toner button followed by the "Go" button. Press the "Cancel" button repeatedly until the lights on the printer flash and then stay on. The toner chip is now reset.
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