Check your printer firmware

It's hard for me to review this product. HP updated the firmware in my printer (a feature I've since deactivated) and so the toner didn't work (if the microchip on the cartridge doesn't match what the firmware wants, the printer won't recognize the cartridge). The company was extremely helpful when I notified them of the problem and they'll be contacting me when they have cartridges released compatible with the updated firmware. So 3 stars for excellent customer responsiveness and anything more will have to wait until I have updated cartridges.

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