hi,
I own a z3100 since 2009 with the original printheads. It works fine until I moved to a new city and left the printer unplugged for 1,5 years, I know, this wasn't a good idea :-(. After this period, the printer said the heads and the ink were outdated, but I could still use them. The first thing I did was doing a printhead cleaning manually with cotton swabs and distilled water, then the automated procedure through the menu, also I shooked the cartridges for a while but carefully. All heads except the red/mk one were doing fine on the test print. I cleaned this one again and again with no better result, then I bought a new one. Then it worked, I made 2 large prints succesfully. After that I tried to calibrate a new paper, this failed because of an error in the color sensors, I ran the ESP diagnotics which failed also by displaying a DeltaE-error. Switching OFF the ESP didnt't help. I thought ok, I only use this machine for prints which are not color-sensitive (like most of mine).
Then the wheel-axis of the belt assembly and the belt itself broke, I replaced it but had to wait for theese parts for 3 months. Now, after installing them, the odyssey began again. The printer doesn't accept the printheads (including the new one) anymore, the mk ink would be empty (not true), the blue ink leaks a bit during the startup on the starwheel assembly, the yellow ink leaks a bit on the supply station. At this point, I think I made a mistake, I started the replace-printhead procedure, and this I cannot stop. When I cancel this, the printer returns to the same point and wants to continue the process. Now I was ready to call a technician. He tells by phone, the main problem after that long period of downtime would be the ink supply tubes and I would have to replace them (and the heads and the ink and the sensor...). Now I'm considering if it's worth doing all this, I don't know what is coming up next, and all the parts asking me to be replaced will cost nearly 1000 Euro.
regards, jakobus