Inkjet printer has waste ink absorber inside, sponge alike. The function of waste ink absorber is to localize and keep waste ink safe inside the printer and does not harm the electrical parts.
Waste ink is produced from print head cleaning process and borderless printing. When capacity of the ink absorber raise to about 90% then warning message appears.
You need to bring your printer to the nearest service center to get waste ink absorber replaced.
Source:
Printer Clinic: Printer Tips,tricks,troubleshooting
E-manualshop: Online source of service manual
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