If it is not empty then the likely cause is that the firmware on your HP printer has been updated automatically.
HP update their firmware to lock you into buying their cartridges. Some of their printers have the option to disable this feature, letting you print with compatible cartridges – this is usually called HP Cartridge Protection. The option is found under different settings depending on the printer, so you will either have to Google how to disable this feature for your printer, or bring the printer in to us (we don’t charge for helping you with this).
If the feature can’t be disabled, you can always return the cartridge and we will issue a replacement. You can find all of our contact info here.
