Technical information

NOTE: Unfortunately, alignment pages and internal self test prints will usually print Ok even if the

cartridge is internally electrically damaged. Do not use these test pages as a proxy for determining

whether a cartridge is good or bad, only the ‘Tap 41/43’ diagnostic test report can yield this information.

A. Ensure BOTH carriage/flex cables and BOTH ink cartridge contacts are thoroughly clean before

proceeding: http://inkjet411.com/?page_id=1519

B. Validate the cartridge’s electrical health by running the ‘Tap 41’ diagnostics test. Refer to

DIAGNOSTIC TAP 41 video procedure at the following link (see 3rd video) on how to activate and read

the service test: http://inkjet411.com/?page_id=434

1. Using two fingers, gently tap the 'Return' and 'Home' keys on touchscreen until the ‘Support’

Menu is displayed (for example, press the button 3-4 times each in rapid & alternating succession).

2. At ‘Support’ menu, select the upper right button until the ‘Reports Menu’ is visible. Select OK.

3. Press upper right button until ‘print mech button tap’ menu is displayed.

4. Press OK, the ‘code = 0’ menu should be displayed.

5. Use arrows keys to change value to 'code = 41' (i.e. press and hold right arrow key). When 'code

= 41', select 'OK'.

6. The diagnostic ‘tap 41’ test pattern should print.

NOTE: Procedure above varies slightly for the D110a printer model. For advanced HP D110a printer

diagnostics information please see our Diagnostics.pdf document at:

http://inkjet411.com/?page_id=1813

--- Providing the color cartridge is partially functioning the Tap 41 diagnostic test print will be printed

(this is a forced service print test which is mainly used for the evaluation of ink cartridge electrical

health). A good HP 60/60XL color cartridge should display 1248 good nozzles, while a good HP 60/60XL

black ink cartridge should show 336 good nozzles. If the results yield anything different then the ink

cartridge is likely damaged and will need to be replaced. Refer to video on how to read the printout.

http://inkjet411.com/?page_id=434

---- If the printer attempts to print the diagnostic test pattern (1 page) then the printer is generally

considered operational and functional, if nothing is printed, but the printer attempts to print the

pattern, then the tri-color ink cartridge is either empty, clogged or severely electrically damaged (black

ink cartridge is not used). You can remove the tri-color cartridge, reactivate the tap 41 test and the

printer will print the diagnostic test print in black ink.

C. Print the Self Test Page:

1. Load plain white paper in the input tray.

2. Touch the lower-left corner of the control panel 4 times until Support Menu displays on the

control panel, and then touch OK.

NOTE: The OK button becomes visible when you access the Support Menu

3. Touch the Menu button next to Support in the upper-right corner of the control panel until

Reports Menu displays, and then touch OK.