The VLM cartridge stop printing but the usage display indicated ink available. I filled the cartridge, reset usage counter and printed a nozzle check. VLM was not present. Did multiple head cleanings (5) checking nozzle after each. All ink levels showed at least 5% available but after last nozzle check no or only a few printed lines for VLM, LC and LK. I figured a clogged print head so performed cleaning as recommended by InkjetMall (capping station, wiper blade, printhead). This effort did not solve problem..... my conclusion ran out of ink (air in line) for those cartridges. Why didn't the printer warn me "out of ink"?
Reviewed procedure and concluded I would have to charge the lines. Would borrow a PC (I am a Mac user) and get the Windows based software required. Also ordered waste tank so I would not dump ink into the printer.
Meanwhile I decided to top off all the cartridges. Found levels displayed on printer and actual cartridge levels is some case were not close. But that is for another thread.
Researching the waste tank install I came across the fact the printer would stop printing if the waste counter reached a certain number. Went to 2manuals.com and found a utility (wicreset) for the iMac around this problem when it occurred I would purchase a rest key. BUT the utility also has a Head cleaning and Ink charge capability plus some other features. No PC required.
With the waste bottle installed, all cartridge full and reset utility on the Mac I performed a Head Cleaning using the wicreset utility. Needed to get the actual printer in the head cleaning mode and prior to pushing the final OK button on the printer to perform the cleaning, I clicked on Head cleaning in the wicreset software. This is a major head cleaning and a lot of ink is used (more than the printer's head cleaning).
Did a nozzle check after the cleaning and behold ALL printed. Must have pushed enough ink to clean the head or clear the air in the lines. Don't know which but I am back in business. No Ink charge necessary. This post is probably more info than questions.