I have Photosmart C510 that will not print black text (comes out light blue). Have read multiple threads and tried new cartridges, contact cleaning, printer head cleaning, and power resets. I have two HP computers, all in one large touch screen computers (Windows 8.1) all linked on wireless net. Both computers get same print results. Have just about come to trying completely new printhead however, the other day my son, using an android phone with HP print app repeatedly printed docs with black text just fine. Help....
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