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Printing ok from computer but photocopier printing very faded

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For HP 950/951 poor printing performance/lack of colors (all print / copy modes), first attempt to resolve by either activating the 'Clean Printhead' routine 2 or by installing new/fully loaded ink tanks. NOTE: The Inkjet411 inkjet printer support site provides detailed recovery instructions for this type of problem:

If, after activating numerous 'Clean Prinhead' actions with no resolve), and assuming you are NOT observing any PRINTHEAD error messages (see NOTE below, i.e. "Replace Printhead"), then the PRINTHEAD* is either severely clogged with ink residue or the ink port(s) are completely dry (i.e. the foam pads that you can see in the bottom when you remove one of the ink cartridges from the carriage assembly).

The PRINTHEAD ink ports can easily dry out if the printer is rarely used, a color has been depleted for awhile or if cartridges are not installed for extended periods of time. HP's recommendation to recover the ink system (i.e. HP OJ PRO 8600 printer model):


To verify the PRINTHEAD is ok, please activate the 'Tap 41' PRINTHEAD Health Diagnostics: (NOTE: applies to touchscreen printer models only):

    a.Press 'Return' button (lower left side) four (4) times until 'Support' menu is displayed.
    b.At 'Support' Menu, using the arrow key, navigate to the 'Service Menu', press Ok.
    c.Use arrow keys to advance to the 'Special Reports' Menu. Select OK.
    d.Use arrow keys to advance to the 'print mech button tap' menu. Select Ok.
    e.'code = 0' will be displayed. Use arrows keys to change value to '41' (i.e. press and hold right arrow key).
    f.When 'Code = 41', select 'OK'. The diagnostic test pattern will print.
    Check the 4th line at the top of the printed report; an electrically good/stable PRINTHEAD will state "Pen Status: Pen OK".........if any other message is displayed then the PRINTHEAD may have failed and may need to be replaced. Re-seat PRINTHEAD and/or clean rear electrical contacts and repeat 'Tap 41' test to verify connectivity is not the issue.
    NOTE: Refer to our support document which includes more detailed diagnostic procedures:

    2) If Pen is NOT ok.....Is your printer still under the 1 year warranty? may have a defective PRINTHEAD* and it may need to be replaced....'the printer' should be covered in this case. You will need to discuss with HP.

    NOTE: you will need at least 30% of remaining ink, within each cartridge, to successfully perform this procedure
      a.Remove all 4 ink cartridges.
      b.Remove the internal PRINTHEAD and thoroughly clean rear electrical contacts and carriage electrical contacts.
      c.Inspect ink foam ports to see if they are 'wet with ink'...this will confirm whether ink is being pulled into the PRINTHEAD or not. If the ink foam ports are completely dry (no significant amount of ink present when blotted with a paper towel, etc.), then the PRINTHEAD is likely considered too dry to support proper ink flow and subsequent printing operations.
      4) Print the 'Print Quality Diagnostic Page' (also use to determine if print cartridge to printhead alignment is correct):
        a. Press return arrow 4 times
        b.Press support menu
        c.Press right hand arrow 7 times to reports menu and press ok
        d.Press right hand arrow 2 times to Print Quality diagnostic report and press ok

        REFERENCE: HP 564/920 printhead water flushing procedure, which may also be used for the HP930-950 ink series printer models:

        NOTE: you will need at least 30% of remaining ink, within each cartridge, to successfully perform this procedure

        If after thorough electrical contact cleaning the problem persists, you may need to replace the PRINTHEAD ASSEMBLY (i.e. get from HP or Amazon), however, as a last ditch effort, you might want to perform a hot water flush on the PRINTHEAD.
          a.Remove all ink cartridges from the printer.
          b.Remove the printhead - refer to instructions here:
          c.Over a sink, run warm tap water directly into the 4 ink ports for approximately 2 minutes - this will effectively saturate the foam ports and blow ink out/thru the nozzle plate bottom.
          d.Using a lint-free towel, remove water from rear/bottom electrical contacts. Ensure printhead electrical contacts and exposed surfaces are fully dry.
          e.Install the printhead into the printer. You may observe a "Replace Printhead message" so you will need to cycle printer power by turning printer off and then on to clear the error.
          f.Install ink cartridges and retest printer. You should observe a New PRINTHEAD alert message followed by an approx. 4-minute preparation countdown prompt.
          g.Test printer output by activating an internal test print or print a test page from our 'Test Prints' page:
          h.If you have reached this point of the troubleshooting and all the previous troubleshooting steps did not work, then the printhead is likely damaged or at end of life* and may need to be replaced.

          5) REPLACE PRINTHEAD*:

          Replace the PRINTHEAD (it is suggested to refer to HP's Procedure)

          As an outside chance, the internal ink/suction pump could be faulty. Best to troubleshoot this type of problem directly with HP personnel if that is the case.

          *Ink cartridges are merely plastic holding tanks for the ink....other than connecting and being recognized by the printhead, there isn't really anything that can go wrong here (our ink formulations and HP ink formulations are 'very' similar so this is not a significant contributor toward this type of condition based on our extensive internal benchmark testing).

          Typically the printhead should not reach its end-of-life until after a minimum of 8 or more complete sets of cartridge changes; officejet models typically have a higher print page throughput average, but this is not always the case. While some printheads may last 12,000+ pages others may only last 2000 pages, your printer results will vary. The printhead will eventually fail in time due to an internal micro-electronics failure, due to the following leading factors: natural electronics degradation over time, printer duty cycle (i.e. # pages printed per month), printing frequency (i.e. time between each print job), print mode (i.e. draft vs. normal), image content printed (i.e. photos vs plain pages) and color mode (black and white only vs. color/greyscale printing).

          Paper types used (i.e. plain paper, photo papers & matte/heavy bond papers) and paper edge curl (i.e. duration in printer and/or exposure to low relative humidity) can also quickly lead to premature printhead failures due to physical 'head strikes' of the paper edges making repeated contact with the printhead nozzle plate surfaces.



          NOTE: For more severe PRINTER error messages which prevent printing altogether [i.e. "Replace Printhead", "Missing Printhead" or "Incompatible Printhead"] this is typical of failed micro-electronics within the PRINTHEAD assembly (nothing to do with the refilled ink cartridges). The PRINTHEAD assembly is a separate electronic unit in which the cartridges plug into and feed ink to and is essentially the heart of the printing system. For reference, please refer to our video on how the PRINTHEAD works:


          CAUTION: Be advised, the use of compatible/clone cartridges (i.e. knockoffs sold thru the internet from overseas) are known to be problematic and may cause printer errors and/or permanent PRINTHEAD failures (due to incompatible ink formulations). We do NOT suggest refilling these types of ink cartridges.....refilling of HP original/genuine ink cartridges is only suggested! HP original/genuine ink cartridges can be identified by the visible HP logo on the front label of the cartridge.

          HP 950/951 Ink Refilling & Additional Cautions:

          For any additional questions please contact us directly:

          -Thank you

Posted on Apr 01, 2015

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Select "Copy" from the touchscreen and then select "Settings..." Adjust the "Lighter/Darker" setting and see if that helps.

Posted on Mar 31, 2015

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