Bought Cone ink and carts from you a couple years ago. Last week, finally got around to filling the carts and installing them.
Printer is a Stylus 7800
Before I started, all OEM Epson cartridges were registering properly (ie, the 7800 recognized them).
First I removed the OEM carts.
Then I installed the filled aftermarket cartridges, all which registered properly, except for Magenta.
When I encountered the Magenta aftermarket cart problem, I removed it and reinserted the OEM cartridge. (I prayed it was just a problem with the OEM cartridge.) Unfortunately, the OEM cartridge that seconds before was seen by the 7800 was now no longer recognized. It seems like the act of inserting the aftermarket cartridge created the issue, but there was no evidence of a broken sensor inside the magenta slot. I photographed the inside of the cartridge slot on a working color and compared it to the non-working Magenta slot ... no apparent difference ... no missing contact wires, no broken pieces, nothing unusual.
What should the next step be?