Note: This does NOT reset the waste ink counter (see Part 6).
Follow the standard cartridge change procedure. If the "ink out" light persists, you may need to ensure the on the cartridge is clean or use a physical chip resetter tool (sold separately for refillable cartridges). Are you trying to fix a specific error light pattern, or are you just setting the printer up for the first time epson xp 2100 reset button