Hi All! I recently purchased a set of new refillable carts for the 7800/9800. I filled them with flush according to the instructions and inserted them into my working 7800. Only 2 carts were recognized without error. The other 7 had "ink cart error." The symbol for the unrecognized ones was flashing with a diagonal line inside of it. Two of the new carts were recognized as good and ready - M Black and L Black. I reinserted the carts several times to ensure that they were seating properly. I also attempted to reset one of the carts. The resetter showed a red light then nothing. Tried another cart, the resetter is dead. The chips are all clean. I made sure that I didn't touch them when filling with flush.
I put all the OEM carts back into the 7800 and swapped them out one at a time (one of the IJM carts and all the rest OEM), and the result for each cart is the same as before. Not to be deterred, I fired up my Epson 9800, which is working properly), and again swapped the carts out one at a time (one of the IJM carts and all the rest OEM). Same result. M Black and L Black functioning normally, the other seven with the "ink cart error." As a long time electronics tech, it seems to me that the 7 chips are bad as far out of the normal range that this may seem. Thank you.