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HP 8600 "Ink System Failure: There is a problem with the printer or ink system. Turn printer off……"

HP Recommended
HP 8600 Officejet Pro +
macOS 10.14 Mojave
PROBLEM: 
After years of great service and few jams, the 8600 Printer’s display is hung up with the following alert and only the “?” Key enabled: 
"Ink System Failure: There is a problem with the printer or ink system. Turn printer off……" I cannot clear that despite many attempts as described below. 
Printer Details:
HP Officejet Pro plus 8600 N911g, 
Model CM750A, 
Service ID 22319
Firmware Version CLP1CN2011AR
Total Page count 38353
USA
Uses HP 950XL and 951XL ink cartridges (all new or 80% full now, only OEM HP inks ever used)
Print head CM751-60013 REV A

Computer Details:

MacBook Pro (Retina, 15-inch, Mid 2014)
macOS Mojave 10.14.3

Wireless connection to printer working

eprint works, puts job in print queue

Printer web page works
HP utility works
Scanning works
Print queue works, but won't actually print
Ink levels work, though sometimes confused
 
I tried everything I could find in You Tubes and HP support, including all of the following multiple times:
Clearing all residue from past paper jams and loading new paper
Replacing ink cartridges
Power cycling
Removing power with the printer on (delays of at least a minute and some overnight)
Reseating the print head 
Cleaning the print head with a syringe and BestPrinter fluid
Disassembling the print head to clean all contacts and ensure that clear membranes above tanks are OK
Measuring the resistance of each of the 4 tank level sensors through the 8 springs (500K to 6M ohms)
Trying to get the set up menu by pressing the (unlit) return key 4 times
Downloaded “HP smart” and "HP firmware downloader”, but it said there was no new firmware for my printer
 
We are otherwise happy with this printer and have many spare 950XL and 951XL cartridges, so wish to stay with it or equivalent. 
 
QUESTIONS I am hoping you can answer:
1. If I replace the Print head, will that solve this problem, or could there be some other issue with the printer?
2. What is the purpose of HP set up cartridges?
3. HP has in stock print heads type CR322A NA/LA Whaler Rplcmnt Kit (PHA, Setup Carts, inst.), but ours is CM751-60013 REV A. Will that work?
4. ANY ADVICE WILL BE APPRECIATED
Thanks and Happy Holidays. Tony Jagodnik
1 REPLY 1
HP Support Agent
HP Support Agent
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Message 2 of 2
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HP Recommended

Hi @TonyJag,

 

As this is a hardware issue, I’d recommend you contact HP Phone Support in your region regarding service options for your printer.

 

Follow the instructions below to reach them:

 

1) Click on this link - https://support.hp.com/us-en/contact-hp

2) Select your product type below.

3) Enter the serial of your device. 

4) Select the country from the drop-down. 

5) Select the chat or get phone number options based on your preferences. 

6)Fill the web-form and proceed further.

 

If you are having trouble navigating through the above options, it's most likely because the device is out of warranty. If yes? please send me a private message with the region you are contacting us from. Check next to your profile name, you should see a little blue envelope, please click on it.  

 

Have a great day! 

 

And, Welcome to the HP Support Community. 

 

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

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