Open Service_tool_v3400.exe , select the correct USB port, find the Ink Absorber Counter section, set the value to 0%, and click Set . Security Warning
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Right-click ServiceTool_v3400.exe and select "Run as Administrator." Open Service_tool_v3400
In the "Main" tab, look for the Waste Ink Counter section. Click "Set" next to the counter value. select the correct USB port