Price exc vat :
When your HP 1500/2500 printer prints for around 20,000 pages, it will prompt you with a "Replace Imaging Drum" "Imaging Drum is low" warning on the LCD display and lock the printer. If your Photoconductor unit is still perfectly good, why waste the money for a new one? Just replace the chip.
HP Drum Reset Instructions:
Replace your old chip with the new chip. Replacing the chip will reset the counter back to full level and you can continue printing.
Resets part numbers Q9704A / Q3964A