Here is what I have done: I replaced the ink chip sensor. This wasn't easy, I had to basically rebuild the whole left side bay (Right side if looking from the back). It was the ink bay closest to the side, so that meant I had to take apart the whole stack to replace that one $3.00 sensor. Anyway, that was done, and all went fine until I went to do a power cleaning and found out that the switch attached to that whole assembly was broken. I replaced the switch, and all seemed to go fine. Then I got an error that I needed to set ink cartridge (not the same one that I originally changed out). So I reset that ink cartridge (actually, I completely replaced it) and now I am back to getting that same original error that my first ink cartridge slot needs to be set. If I move around the cartridges, I keep getting the same error that it is in the first slot (one closest to the side that the White in is on). If, however, I put in a bad chip in say, the third slot, I get an error that I only need to set the ink cartridge in that third slot, and the first slot is fine. I reset that cartridge with a good chip, and error moves back to first slot. I am about to throw this thing, but it is too heavy. Anyone have any recommendations? I have been down for almost a month, and I just replaced the print head. Very frustrating.