Every new IM cartridge with Selenium set is read by new 7890 except Light Black. Tried wiggling, re-inserting, re-setting chip, etc. to no avail.
Ordered replacement cartridge and chip. When they arrived I had to transfer ink from original cartridge to new one.
Again, 7890 does not recognize cartridge.
Decided in desperation to insert sample Light Black that came with 7890 to see if the problem is the machine or the cartridge.
Decided to try transferring ink from the second IM cartridge to the Epson Light Black cartridge, seeing as that one works. Yes, I know there will be a mixing of the IM ink and the Epson ink. I'm so fed up I have been forced to this.
Had to use bleed opening on Epson seeing that they have no capability for refilling, big surprise. 5ml at a time.
All the ink is in, but now it spills out of the bleed opening and I don't know how to stop it. Fortunately I have not spilled anything into the printer.
I have even thought of simply using the Epson Light Black with the rest of the IM Selenium ink set, but know that would probably result in darker prints. Epson Light Black is probably darker than Selenium #7.