HP Faces Class Action over Printer Firmware “Time Bomb” That Prevented Use of Aftermarket Cartridges


Starting around September 13, HP OfficeJet, OfficeJet Pro, and OfficeJet Pro X inkjet printers and all-in-ones that use the HP 934/935, HP 950/951, and HP 970/971 cartridge families suddenly stopped using certain aftermarket inkjet cartridges (see “HP Inkjet Printer Firmware Update Disables Some Third-Party Inkjet Cartridges”). The cause was the firmware used in these devices,

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