Thanks for your reply. I will try to be as specific as I can and hope that the details will assist you in helping me resolve the issue at hand.
The carts were filled for the first time via the vacuum procedure, per instructions and video. That is what I meant by "fill new", as in for the first time. I replaced the Epson carts that came with the R300o one at a time, as they emptied out. The only Epson cart I still have in the R3000 is the Matte Black, since the seller sent me an extra one.
When I initially filled the carts with the vacuum procedure, I tried to make sure they were filled as much as possible and the exit chamber had ink in it. I had no problems with any of the carts and the printer was working fine.
I got a prompt that the Photo Black cart was too low to print a 13x19 print. As far as I could tell, there was still some ink in the cart and chamber, but it was hard for me to tell exactly how much there was. I refilled it, following the written instructions for refilling a cart. I tapped the cart on a paper towel, reset the chip and when I replaced the cart in the printer, the printer indicated that it was indeed full.
The air vent hole is open and has been ever since I first filled the carts. I kept all the air vent plugs in case I needed to refill using the vacuum process.
I got the Adjustment Program and was able to do a cleaning procedure and print out a test print. However, when I tried to run an Ink Charge, I got a "Out of ink" error from the app, and the printer screen indicated that the Yellow, Light Magenta, Magenta and Cyan carts were incompatible and the was a red "X" over each of the icons. When I turned the printer off then turned it back on, all carts showed up normally with the various amounts of ink in the indicated. The printer recognizes the carts and print fine other than the Photo Ink.
Ar you suggesting that I first try to refill the Photo Ink cart by the vacuum method? In that case, should I remove the ink with the syringe, plug the air vent and fill it as if it were to be filled for the first time? What if there is air in the line? As I understand it, the only way to eliminate the air from the line is to run the "Ink Charge" procedure with the Adjustment Program, but that won't work if the program doesn't recognize some of the carts and considers them emtpy.
I hope the info was detailed enough so that you can evaluate and suggest my next move.
I waited about 15 minutes and ran a print test. There was