Excellent, I'm glad to hear the new chips resolved your problem.
It is a well known issue that the chip batteries have a limited life of about a year, so based on the fact you purchased the carts over a year ago, I expect you will need new batteries for chips for other carts as well. Other chips will not be a warranty replacement (I sent you these three as a favor), since the carts were purchased over a year ago.
Information about chip battery life, and how to replace chip batteries can be found here: http://www.inkjetmall.com/wordpress/product-use/r3000-cartridge-batteries/
Replacement chips and batteries are available here: http://shopping.netsuite.com/s.nl/c.362672/sc.18/category.84880/.f
Thank you, we work hard to provide the best customer service possible and keep our customers happily printing. We believe the personal/human touch, as well as knowledge and genuine care is important for good customer service, and wish more companies felt the same way.
Please let me know if you have questions or there's anything else I can help you with.
Best regards~ Dana