This problem can be caused by any one of the following:
The print head is dry or blocked. Please perform the self-cleaning programme (according to printer instructions) at least three times and resume printing. Should the same problem occur you may need to replace the cartridge. (Cleaning cartridges are available from Skysheen, with cleaning fluid designed to remove ink from the print heads)
The yellow sealing label may not have been fully removed. Remove the sealing label completely in order to let air enter the top of the cartridge through the air channel. (If the sealing label is removed after loading the cartridge into the printer, printing quality cannot be guaranteed)
This may indicate improper protection or irrecoverable damage to the print head.
On chipped cartridges, it is essential that the chip on your cartridge is fully in line with the chip inside your printer. Take out your printer ink cartridge and reinstall.