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‎10-22-2017 11:47 AM

HP Recommended

Hi Bob, Can you explain how the printer is able to use the existing printhead to do an alignment page (which it prints perfectly each time) and yet will not print normally?

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‎10-22-2017 02:53 PM - edited ‎10-22-2017 02:55 PM

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@Haughfoot wrote:

Hi Bob, Can you explain how the printer is able to use the existing printhead to do an alignment page (which it prints perfectly each time) and yet will not print normally?

The Officejet Pro 8620 was released years after I retired from HP, so I do not have any specific knowledge, but I can suggest a possibility: Generally the printer will do some rudimentary tests at power-on and may do a more extensive test before printing.  Some cases will allow printing even if there are certain errors - for example,  a test page will generally be allowed to print, even in the case of a failure.  This is to allow diagnostic information to be printed even in the case of some errors.  I do not know that printing an alignment page would fall into this exception, but it is possible. 

 

I would certainly suggest reseating the printhead and cleaning the electrical contacts as I suggested in my post above.

 


Bob Headrick,  HP Expert

I am not an employee of HP, I am a volunteer posting here on my own time.

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‎12-09-2018 02:58 PM

HP Recommended

I have to agree it seems odd that these EXPENSEIVE print heads randomly fail.  I just recently bought a complete set of genuine HP ink (over $100) and used them for months without a problem..and all of a sudden AFTER the warranty is over the print heads FAILS.  I use my printer for home use to or 3 times a month.  Nothing hard or enduring.  A new head is OVER $150.00 and a new printer different model is $130.00 BUT uses DIFFERNT INK.  So now my 1.5 year older out of warranty printer and over $100.00 worth of ink are USELESS.  sounds like planed obsoleescense to me!  HP SUCK!  And the trouble shooting procedure is a joke.  HP should be ashamed to put such CRAP out there for there users..

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‎04-13-2019 01:44 PM

HP Recommended

I don't even know what a printhead is.  And there is nothing in my book that I see.  It tells me that appears missing, not detected or incorrectly installed.  One day it was working and the next came up with this message.

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‎04-13-2019 01:46 PM

HP Recommended

What is the printhead?

 

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‎04-13-2019 04:44 PM - last edited on ‎09-28-2020 05:12 PM by Moderator

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@Vee73 wrote:

I don't even know what a printhead is.  And there is nothing in my book that I see.  It tells me that appears missing, not detected or incorrectly installed.  One day it was working and the next came up with this message.

The printhead is the electrical part with nozzles that spit ink droplets onto paper.  If your printer is the HP Officejet Pro 8620 I would suggest the troubleshooting steps in the document here.  The printhead assembly contains the printhead, electrical connection to the printer and also the parts that hold the ink supplies.

 

Image: Nozzles and electrical contacts

  1. Nozzles
  2. Electrical contacts

Bob Headrick,  HP Expert

I am not an employee of HP, I am a volunteer posting here on my own time.

If your problem is solved please click the "Accept as Solution" button 

If my answer was helpful please click "Yes" to the "Was this post helpful" question.


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