I bought new HP 902XL ink cartridges and replaced all three colors - but after replacing them, my printer will only print in black & white. Have tried from a PC, from a Mac, from my phone, and have tried copying but all will only print in black and white.
Referencing this and other support pages (https://support.hp.com/us-en/product/hp-officejet-pro-6970-all-in-one-printer-series/8289585/model/1...) I have tried uninstalling and reinstalling all drivers/firmware, have tried hard resetting the printer, have tried the test page/cleaning pages but all only show black and white. The print settings are Color, and the printer says the ink levels are full for all 3 colors -- and have also confirmed all three are vented properly. I actually returned and re-bought new ink in case I had faulty cartridges but same problem.