You could clean the black ink cartridge. For this you need to remove the blank ink cartridge which is present in the printer. In order to clean the laser or scanner block you could use a cotton swab as it would fully clean the dirt. You need to clean the grime and the dried ink present in the printer. This would remove all the hindrances which prevent the ink from flowing. Cleaning the printer heads would also help to solve the problem.
Possible that the B/W cartridge is not contacting or is blocked. remove and fit back. Now remove your printer from the PC and uninstall the printer software. Now reinstall the printer software and connect the Printer to be detected and installed. Check printer properties to see the ink levels.
Use head cleaning before a test is taken . It is possible that the head is not reacting to the need of the command , can be an issue with ink drying , can also be poor ink cartridge contacts
SOURCE: black ink will not print. Colours ok
Get a syringe, remove the needle, remove the ink cartridge and use the syringe to blow air GENTLY through the hole the cartridge connects to. Make sure you have a cleaning cloth to remove ink dislodged from pipe connected at the print head, do this gently to remove any obstruction and there should not be too much mess and can easily be cleaned up.
SOURCE: brother hl3040cn. I have replaced black cartridge
This printer tells you to replace the toner when there is still plenty left. You can override this as follows:-
1. Open the top cover
2. Press "Secure print" and "Cancel" together
3. This brings up the cartridge menu. Press "OK" twice for each entry, then scroll down to the next one. There are two entries for each colour, dunno why.
4. When you've done all 8 entries shut the lid and print.
This may need to be redone every few months.
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