My son's ip4200 had an original cartridge, magenta I believe, that kept giving problems - kept saying it had two magentas installed, then it couldn't find the magenta, on and on. I replaced it and the printer worked fine. I tried his cartridge in my printer and had the same problems. I tried resetting the chip and it seemed to reset, but once installed it was still buggy, so there are such things as bad chips and I wouldn't mess around with one, just toss the cartridge and get another.
Hmmm, I still have that cartridge - I should use it as a test cartridge to try my hand at flushing shouldn't I?
Hmmm, I still have that cartridge - I should use it as a test cartridge to try my hand at flushing shouldn't I?