Sorry for not responding sooner, I'm home sick today.
Did you use the chip from your previously working Epson yellow cart on the reset cart? Occasionally a reset chip can be bad, but it would be quite unusual for you to have two bad yellow reset chips in a row! I'm curious if it's a physical fit of the cartridge in your printer (?) When you install the yellow refill cart, does your printer LCD display "cartridge door open, close door", or "no cartridge", or a different message? Do your yellow reset chips have any markings on the top to indicate they're Y chips?
Please check the reset chips by following the instructions below:
38XX “80ml” refill cart reset chip check:
The plastic base of every 3880 reset chip should have three small plastic tabs around the side that hold it onto the cartridge. If any of these tabs are broken or bent inward, the chip will not stay secured to the cartridge, therefore not have a good connection with the Epson chip underneath, which will cause an error. Also, on the back of every reset chip, there should be three metal pins that stick out and touch the Epson chip- the three pins should be equal length for proper contact with the Epson chip. Please check the plastic base to make sure there are three plastic tabs, and if they are all in place, gently bend them outward slightly to ensure they catch and hold onto the cartridge. Also check to make sure the three metal pins are present and equal length. On the front of the chips, please check the gold contacts to make sure nothing is on the contacts that would interfere with the printer's ability to read it- if you see anything on the gold contacts, gently clean them with either an alcohol pad or pencil eraser. After checking all these things, push the reset chips back onto their corresponding cartridges and make sure they are pushed all the way onto the cart for a good connection with the Epson chip, then reinsert the cartridges into your printer and see how the printer responds.
Generally, if the printer displays "NO cartridge" and flashes all carts when you install one (when they were all previously working before installing the last cart), this is caused by using a reset and/or Epson chip that is for a different color position. When a single cart displays an error, this is generally caused by a bad chip, or poor connection between the cartridge chip and printer's chip sensor.
Please let me know so I can help you past this and back to happily printing~ Dana