The HP 2600 cartridges are designed with a chip so that the printer can remember how much toner is left in the cartridge, and therefore warn you when you are running low on toner. This feature of the HP 2600 printer cartridge is called "diagnostics". Without the chip, the cartridge will not print. For a 100% successful refill / reset, you will need to order these cartridge specific HP 2600 replacement chip. Its quick and easy to replace the HP 2600 chips and restore your cartridge to "new" specs.
The HP 2600 Toner Cartridge Smartchip of us is high quality , and works well in north american, europe, asia, etc.