Technical information

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2) Remove ink cartridge and inspect for smart chip surface – check for scratches or ink residue. See

pictures of cartridge chips at following link for reference (see ‘Abnormal Cartridge Errors’):

http://inkjet411.com/?page_id=1925

3) Perform a Printer Reset:

HP OJ 6500 Printer Reset:

a. Ensure printer is powered ON.

b. While the printer is Turned ON, unplug the power cord from the back of the printer. This should

turn OFF your Officejet 6500.

c. Connect the power cord back into the printer while pressing the “#” and “6″ keys on the

keypads of your printer.

d. Wait until the screen turns black before release the keys. Your printer should turn ON by itself. If

not, press the power button to turn ON the printer.

e. The printer should now start to do the a Semi-Full Reset on your printer. Wait until it finishes

the whole process and settles down.

HP OJ6500A/7500A Printer Reset:

a. At Touchscreen, using two fingers, quickly press the 'OK' & 'Return' buttons in a quick

alternating method (refer to video link below which ‘generally’ illustrates how to perform this):

b. After a few seconds the Support Menu should be displayed.

c. Navigate to Semi-Full (or Full Reset) and reset the printer.

d. Send Test Page to test.

REFERENCE ONLY [ HP PS C4600 - Tap 41 Diagnostic Procedure – REFER TO 3

video]:

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

HP Officejet 7000 Printer Reset:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&pro

dSeriesId=3882903&prodTypeId=18972&objectID=c01759607

a. Press the Power button to turn the product off.

b. Disconnect the power cord from the back of the product.

c. Wait 30 seconds.

d. Reconnect the power cord to the back of the product.

e. Press the Power button to turn the product on.

3) For more severe HP 920 cartridge error messages which prevent printing [i.e. Incompatible Printhead"

or Ink System Failure] is typical of failed micro-electronics within the PRINTHEAD assembly*. To verify

PRINTHEAD electrical function, conduct the ‘Tap 41’ diagnostic test:

a. Load Letter/A4-size paper into paper feed tray.

b. Press the * and # keys simultaneously.

c. Enter 124 at keypad. The ‘Underware’ menu should be displayed.

d. Use the arrow keys to navigate to the System Menu. Select Ok.

e. The 'print-mech button tap' menu should be displayed.