This morning all six (left side) cartridges appeared blank. Previously two would need to be ejected and then returned to get the printer to recognize them. I have tried all kinds of off/on and other combinations of the printer. Wells says that if one chip is bad, it can take out the whole bank of inks. Is there a way to determine where the problem is, and then a way to fix it. I bought these inks and cartridges at least two years ago. Perhaps they have batteries. Thanks for your assistance.