Help! My Hp CLJ 4650 is about 10 years old and I love her. Tonight, I received an error that I cannot fix after much troubleshooting. Maybe she is too old but I thought I would try. So I have the error BLACK CARTRIDGE NOT INSTALLED. I had 2 new black toners that I tried and that did not work. I cold reset, I hard reset (many times), I reseated all toners, I took out paper tray, I looked for any jammed paper, I dusted inside of printer and I cannot get the black in to print. Nothing. Nada. Any ideas? I am so sad. THANKS
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