The Epson Stylus NX415 is a color inkjet printer. The printer uses T088/69/68 ink cartridges, which is the first generation of Epson ink that employs a wentess sensor behind the primary chip.

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cannot recognize ink cartridge 88/69 in my Epson Stylus NX415 printer

cannot recognize ink cartridge 88/69

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This is an old question, but I have some background on this printer since I used to have one. The NX415 was one of the first generation printers Epson released with the dual chip setup using a wetness sensor that has continued to create headaches for end users and refillers. The external green chip you see is backed by a wetness sensor that detects the level of ink inside the carts. If you get it get to ~25% it’s permanently locked into read only mode and will need a chip replacement. This is an issue on the 88/69/68 and all of the carts that have been released since this series. The Epson black cart series no longer has the wetness sensor but the read only issue remains.

In many cases, these wetness sensor printers are also known to kill the chip if you remove the ink with a low ink indication and the carts never work again, especially once you hit the magic ~25% capacity mark I mentioned before. This is exactly why Epson doesn't recommend removal unless you intend to replace the cartridge - you're probably going to kill it if you don't know this is a major no no.

This is an old post, but it describes the problem: Freedom to print 69/68 teardown.

It sounds like you removed a low cartridge and replaced it not knowing about this problem that affects the modern Epson cartridges. The cartridge is probably ruined and no longer usable, so you probably need to replace it OR fit a new chip on if you're equipped to change it. Of course, it has to be one that Epson hasn't sued over to prevent importation. Thankfully the NX415 is a grey cart printer, so they aren’t using firmware to block 3rd party ink if you can’t afford OEM.

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