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Here is a little background:HPallegedly sells printers at a loss.

To make up for it, the company sells ink cartridges at elevated prices, which infuriates the users.

Inkjet printer in an office

As a result, users turned to third-party ink cartridge manufacturers.

HP responds by embedding chips into the cartridges, rendering third party products useless.

Users respond by refilling old cartridges instead of buying new, third-party ones.

The signal is there altered, telling the printer that the page limit has not yet been reached.

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