Just so everyone knows.... I had three ink cartridges with bad chips. I really don't understand how 3 would go bad at once, but it works great now. Epson tech replaced circuit boards, power supplies, etc. and nothing worked. Replaced the three almost full 350 ml carts and it works like it did before. Luckily, I had a few cartridges of inks laying around that were almost empty. That's how we figured it out.