My MP160 printer had been working fine until I had it powered off for 3 weeks. Now I get an E22 error when I try to use it. I've checked the carriage for binding, dirt, etc. I've reinstalled the driver. I've run MPTool in low-level mode to reset the ink levels. However, the reset waste ink box is greyed-out on MPtool. Can this be a problem, and is there anything else I should be checking? I like this all-in-one unit, and would like to keep it. Thanks.
