Printing Errors or Lights & Stuck Print Jobs

2 problems:

My OfficeJet 6962 printer prints black ink on test pages but printing any other document it will not. printing a photo whether on photo paper or plain paper results in odd uneven color tones.

I did the following:

1. Cleaned the print heads 3-5 times

2. used the online auto-agent and followed the steps

3. reset the printer to factory default

4. printed from multiple devices.

5. Same issue between printing, the scanner bed, and the document feeder.

6. I use HP insta-ink so I cannot just swap the cartridge as it is showing as half full

7. Can't contact Support Agent because the warranty has expired.

2nd problem - when scanning through the feeder, the printouts have a black line running down the middle, I've cleaned every part imagineable.

Can the print head be replaced?  This is absurd, we print less than 20 pages a month.