During the process of using LCL ink cartridges, if you meet the printing problem, please firstly follow these steps to figure out which cartridge might went wrong (We provide the service of sending replacements for free for these defective ink cartridges):
Step 1: Please replace the new Black ink cartridge with the old one. If the print problem is resolved, then this Black ink cartridge is defective. If not, please do as the step 2.
Step 2: Please replace the new Cyan ink cartridge with the old one. If the print problem is resolved, then this Cyan ink cartridge is defective. If not, please do as the step 3.
Step 3: Please replace the new Magenta ink cartridge with the old one. If the print problem is resolved, then this Maganta ink cartridge is defective.
If not, please do as the Step 4: Please repeat the above steps to replace the other color of new ink cartridges with the old ones respectively, then you could find out the defective ink cartridges and please let us know and we will provide you further assistance.
To avoid affecting the patent, this ink cartridge doesn't have LED display light, which will not affect any of your use. Please check the ink volume on the computer and according to your needs to choose original or LCL ink cartridge.