A few years ago I had a Canon iP3000 which started printing a rusty orange color instead of yellow. However it would print yellow after a nozzle clean cycle or printing a lot of yellow. As if running some yellow ink through the printhead flushed out possible contamination from the magenta. Eventually I resorted to cleaning the printhead with water then later with alcohol. Each cleaning solved the problem, but for only a few days. My last resort was taking apart the printhead by removing the 2 tiny screws on the bottom & seeing if there was some type of internal leakage between pathways. I was warned this would probably create a printhead error, and it did. I knew this before taking it apart but felt there was nothing to lose. I was thinking about using the iP3000 again & either buying a new printhead or taking it apart again. Perhaps an electrical connection broke that I was not aware of. What supposedly breaks or goes wrong when taking apart a printhead? Has anyone ever took one apart & put back together & had it work?