OfficeJet Pro 8020 - replaced color print cart's, but still won't print color.

[GJM69]

The printer stopped printing color before I changed the color cartridges, but the cart's were empty.  Replaces with brand new HP color ink carts, still no Magent or Cyan.  Black and Yellow only.  I've been thru the entire trouble shooting process so many times, cleaned heads, aligned heads. checked the cart vents, and cleaned the contacts.  something is wrong with the magenta and cyan processing.   How do I trouble shoot physical technical problems?   I'm open to any and all ideas!  Please help, this is a nice printer, when it $%#$%!$@# works!

[A_Gayathri]

Hi @GJM69,

Welcome to the HP Support Community

I understand you are facing a print quality issue with your HP OfficeJet Pro 8020 All-In-One Printer. Not to worry I will help you to get a resolution to resolve the issue.

To assist better:

• Are you using genuine HP ink cartridges?
• Does the copy print out the same way? 
• What's the application you are trying to print from? 
• Have you tried printing from a different application or device? 

While you respond to that, let's print a Print Quality Diagnostic page -Post the Print Quality Diagnostic page here so we can help you further.

Let's perform a power drain: 

• With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
• Remove the USB cable, if present.
• Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
• Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord (This is important) and then plug back the power cord to the printer.
• Turn on the printer and wait till the warm-up period finishes and the printer is idle

Update the printer firmware 

• Click here to download and install the latest printer firmware from your product
• Click here to know different methods of updating the printer firmware. 
• follow the troubleshooting steps  HP OfficeJet 6900, 8010, 8020, 8030 printers - No black ink, wrong colors, other print quality issue...

Hope this helps! Keep me posted. 

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