Perform Tap 41 PRINTHEAD Health Diagnostics Test, along with supporting service level/diagnostic tests (service menu access procedures do vary by HP printer model, refer to HP printer diagnostics document, pages 45-47, to view normal display messages,
http://inkjet411.com/?page_id=1813 )
Tap 41 PRINTHEAD Health Diagnostics (NOTE: applies to touchscreen printer models only):
1.Press 'Return' button (lower left side) four (4) times until 'Support' menu is displayed.
2.At 'Support' Menu, using the arrow key, navigate to the 'Service Menu', press Ok.
3.Use arrow keys to advance to the 'Special Reports' Menu. Select OK.
4.Use arrow keys to advance to the 'print mech button tap' menu. Select Ok.
5.'code = 0' will be displayed. Use arrows keys to change value to '41' (i.e. press and hold right arrow key).
6.When 'Code = 41', select 'OK'. The diagnostic test pattern will print.
7.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.
Nozzle test (use to determine if all ink cartridge nozzles/printhead is firing all colors properly)
Press return arrow 4 times
2.Press support menu
3.Press right arrow 5 times to print diagnostic menu and press ok
4.At nozzle test press ok
Self test/printer status (use to print internal printer settings)
Press return arrow 4 times
2.Press support menu
3.Press right hand arrow 7 times to reports menu and press ok
4.At self test report press ok
Extended self test (use to evaluate color performance and obtain total page count)
Press return arrow 4 times
2.Press support menu
3.Press right hand arrow 7 times to reports menu and press ok
4.Press right hand arrow 1 time to extended self-test and press ok
Print Quality Diagnostic Page (use to determine if printing alignment is correct)
Press return arrow 4 times
2.Press support menu
3.Press right hand arrow 7 times to reports menu and press ok
4.Press right hand arrow 2 times to Print Quality diagnostic report and press ok
Print head recovery (runs 'intensive' printhead service cleaning routines, i.e. for a clogged printhead)
1.Press home key twice
2.Then return key
3.Then home key twice
4.Then return key
5.Then home key twice...............this will gain access to the Engineering Menu
6.Press the 'service menu'
7.Press right arrow 4 times to 'service test' and press ok
8.Press right arrow:
a.16 times to 'print head rec level 1' (basic recovery)
b.17 times to 'print head rec level 2' (medium recovery)
c.18 times to 'print head rec level 3' (thorough recovery)....suggested for severe streaking
9.Press 'ok' to activate either of the 3 selections above.
Semi full reset (can be used to help address intermittent or incorrect printer behavior issues)
1.Press return arrow 4 times
2.Press support menu
3.Press right hand arrow 2 times to Resets menu and press ok
4.Press right hand arrow 2 times to semi full reset and press ok (Note: this will return printer to factory default condition; regional setup will be required following this action)
* Failure of the PRINTHEAD has nothing to do with refilled ink cartridges; the PRINTHEAD assembly is a separate electronic unit in which the cartridges plug into and feed ink into. Refer to NOTE below.
4) To rule out printer/cartridge connectivity (assembly interface/connection) issues please ensure you have followed all steps on HP's support page - this includes PRINTHEAD removal and thorough cleaning of the electrical surfaces on the PRINTHEAD and on the CARRIAGE ASSEMBLY:
http://www8.hp.com/h22157/video-gallery/us/en/customer-care/printers-and-all-in-ones/replace-ink-and-toner/2286857593001/replacing-the-printhead---hp-officejet-pro-8600-e-all-in-one-printer/video/
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