What are the potential issues with the ink supply system that could trigger this error?

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Grade: Education Subject: Support
What are the potential issues with the ink supply system that could trigger this error?
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Problems within the ink supply system can include blocked ink tubes, air bubbles in the lines, or a malfunctioning ink pump. These issues prevent ink from reaching the printhead, leading to the 'Service Required' error. Inspecting the ink tubes for kinks or blockages is a good starting point.