For the XP-440 to XP-446 and XP-640 to XP-646: Press and hold the STOP button, LEFT ARROW button, DOWN ARROW button and POWER button simultaneously (thanks to Ken for the combo).For many series from XP-300 to XP-630: Press and hold the STOP button, LEFT ARROW button, HOME button and POWER button simultaneously.As soon as the printer is completely shut down, perform the following key combination until the firmware update screen appears in white text : This will ensure that all cartridge-related errors will be reset after applying the alternate firmware. Remove all of the ink cartridges from the printer.You must use a Type A/B printer cable and plug it into the correct USB port on the printer (square) not the standard USB input port on the front. When in recovery mode, a USB connection is required to transfer the firmware to the printer, even if you already have it connected wireless. Connect a USB Printer cable from the back of your printer to a computer or laptop.This guide is for the Epson XP series and should work on any model from 300 through at least 830, and likely many others with minor adjustments in the instructions. The difficult part is figuring out how, since printer companies are notorious for removing old firmware as soon as the new version gets released and they rarely document how to get the printer into recovery mode or transmit older firmware. Luckily, it is usually possible to restore an older version of the printer's firmware and resolve these newfound and self-imposed incompatibilities. The company expects you to replace the ink with their much more expensive name brand format in order to continue using the printer at all. Printers affected by this will suddenly receive notices that one or more ink cartridges are unrecognized, incompatible or non-genuine. Although the firmware frequency varies by model, many printers were issued a January 2018 update that effectively disabled the majority of third party ink cartridges.
For Epson, new firmware updates are applied by default as part of the routine software update checks.
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