Bricked up HP Officejet Pro 8600 N911a from Z20 951xl Magenta ink Cartridge

[Buttazyo1]

I'm in the same boat....please help!!!

[Bob_Headrick]

From your other posts here I understand the following.  Please correct me if any of these assumptions are incorrect: You have an Officejet Pro 8600 N911a printer that is locked to the Z20 region.  You are in the US where only Z10 replacement cartridges are available.  Your operating system is Windows 10 x64.  At this point you need to have a regionalization reset done on the printer to accept the Z10 cartridges.  You have the full featured driver installed (available from HP here) and the printer is connected with USB.

With the above conditions please perform the following to get the reset completed.  If any step fails or gives issues please respond with details of exactly what step is the issue and what you are seeing:

• Start with the Z20 (or previous generation 950/951 cartridges that do not have a Z designation installed in the printer. [Note - after installing the Z20 cartridges and starting the process do not change the cartridges that are installed from this point on until the regionalization reset is completed.  Once the regionalization reset is completed you will need to replace the Z20 cartridges with Z10 cartridges.]
• Go to the Windows 10 Start Menu (1).  Left-click on the HP folder icon (2), this will expand the list of items in the HP folder.  Double-click on the HP Officejet Pro 8600 icon (3).   If the HP folder or the HP Officejet 8600 icon are missing then download and install the full featured driver.
• When the HP Officejet Pro 8600 Toolbox opens double-click on the Estimated Ink Levels box in the upper right of the toolbox (4).
  
• This will open the Estimated Ink Levels toolbox.  At this point put the cursor in the large white space, then press and hold the SHIFT and CONTROL keys down.  While holding the SHIFT and CONTROL keys RIGHT-click on the white space area (5).
• This will bring up a special box "for use in conjunction with support personel only".  This will have a series of numbers that you will need to provide to the HP Support agent that.  Click the "Copy To Clipboard" button (6).  Once you have clicked the Copy to Clipboard button close the support window by clicking the X in the upper right (7).  IMPORTANT - DO NOT enter any numbers in boxes 41-45 at this point.
• At this point you will have the information needed by the HP Support Agent to generate the needed reset codes.  Go to the "Private Messages" envelope in the upper right when logged into the forum and find the message from the HP Support Agent. Right-click in the reply box and select "Paste" to paste the results of the support box into the message.  Add details such as your printer model, what cartridges were installed in the printer, and what region you need the printer reset to (Z10 for your case).  I would expect the agent to respond within a day or two with the reset information as well as instructions to apply the reset.