My black ink printing all of a sudden stopped..ink in cart.all other colors work fine

I had a HP that wouldn't print because the Cart. were past a certain date. I finally just went in to the pc and set the date back, and the Cart. worked fine.

you remove the color cartridge and clean the nosil with tisu papper or soft cloth
the nosil may be block

I use a small diameter silicone tube tocarefully "prime" stubborn new carts by sucking a drop of ink out ofthe tiny print holes in the printhead part of the cart. Ink can dry at the headand since these carts work by electrical excitation, there needs to be liquidof each color at the holes. Slap a drop of water with your finger on the holesto start easy hesitant ones. Do not get the contacts wet.

check the ink level of the black cart. and try to clean the cart copper contacts with the lint free cloth..
n try to print..
else try it with a another set of new cart..

Assuming genuine ink cartThis worked for me on a HP printer 1.Try print black text ,and run many copies black only. I ran 25x12 times still no black. Run head clean after about each 50 sheets. Persevered and finally BLACK ink OK
Good Luck Inkypete

sounds like its a expired ink issue. on alot of the hp photosmart printers the ink has a expirey date on the carts the best solution would be to contact hp and chances are they will send you free carts if your ink has been expired. when a black ink is almost out most of the time it trys to draw ink from the color carts mixing to make the appropriate color.

but you can also try the following.
See the instructions for
calibrating a print cartridge in
the Care and Maintenance
section of the HP Photosmart
Printer Help.

if you replace the black ink cart with an original one then it's the print head
Solution: Cleaning the Print Head - C555 / C560 / C635 / C530 / C545

Untitled Document Follow this procedure to clean the BJ cartridge print head:
1. Press 2. Press 3. Use or to select the [HEAD CLEANING]..
4. Press .
The MultiPASS cleans the print head.

1. Took out the color ink cart and clean the copper contacts of the ink cart with cotton swab, make sure that you do not touch the silver nozzle .
2. Try new ink color ink carts as someime this issue came up when the ink carts are about to finish up.
3. Replace the ink carts and do not us a refill ink.

clean contacts on back of blk cart and printhead with alcohol on micrfiber towel

Unplug machinepowercord. Open printer and take all carts out. Plug in power. Machine demands carts. Put new one in: Replace with original ink carts!. When asked push 1 (yes New cart). If you have used thirdparty carts, there could be a prob due to construticon or ink quality. In case there is no bk after 3x cleaning cycles anymore, the head is clogged: This happens because the filter in front of the nozzels is clogged by pigmented ink. DO USE ONLY DYE INK for all types of brother inkjet machines!!!