Recently, I noticed that the yellow ink is not showing on printed documents. I bought new ink and tried to fill it today, but it was already full (as was blue and magenta). I have tested it again and it's not coming thru at all (my green text is blue, red is magenta, etc.). How can I check to see if something is plugged? Cartridge seems just fine, about 6 months old and I only print occasionally. HP Deskjet 722C and #23 cartridge. Thank you.
The ink jet is block this happens when you don't you your printer for a long time or you use the genetic cartridge. What you could do is disassemble the printer head and use hot water to clean it out. Good luck
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