My Deskjet 6940 has been sitting awhile and now the print head is plugged and wont print in black. How do I remove the print head for cleaning?

SOURCE: REPLACED INK AND STILL NOT WORKING

Due to shiaty design, it is easy to accidentaly puncture the printed circuit with the sharp end of the retention spring while inserting a new cartridge. Use a flashlight too look at the white/copper sheet the cartridge makes contact with and look for a puncture (probably near the lower right side.)

SOURCE: Cleaning the printer heads

use the deskjet 6940 toolbox that should be loaded. You should find it in the driver, look for a maintanance tab.

SOURCE: HP Deskjet 6940 not printing after replacing ink cartridge

My HP Deskjet 6940 is not printing. The color (left) low ink light is dark and the black (right) low ink light is flashing. I replaced the black ink cartridge with a new one but the low ink light continues to flash. No tears/rips in the circuit strip and all the copper leads appear to be connected

SOURCE: Blank Ink not pumping to print head

Turn off the device after removing the printhead After removing the printhead, turn off the device, wait about 20 seconds, and turn it on again without the printhead installed. After it has restarted, reinsert the printhead.

it will go through this long routine of perhaps 20 min or so. after its compleate it should print great.

Ginko

• 19396 Answers
• Posted on Apr 18, 2009

SOURCE: printer replaced with black cartridge, and doesnt print

Either the print head for black is faulty, or the wiring to the black print head on carriage are broken. Try also cleaning the metal sensor to the black cartridge inside the ink carriage.