In response to this Epson message I replaced the battery with a good one (checked with a voltmeter), and tried inserting it twice in case I’d put it in the wrong way or with a poor contact. Same message. No change after switching off and disconnecting for about 10 minutes. I did try cleaning the contacts too.
I bought my carts late 2013 or early 2014 from our local supplier here in New Zealand, so they might have been sitting around for a while before then. Does this sound like the cart or chip needs replacing? Is there a lifespan to the chip?
If it’s the chip, do I get the replacements direct or through the local supplier?