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This solution was provided by a customer of ours (thanks Rob!) and it has worked on several R2 mainboards This article is provided for informational purposes only. Always have a qualified technician work on your 3D printer. Symptom: Robo R2 fails mid-print and reports print head disconnect, "Error Detected Connection Interrupted" Suspected Cause: Early R2's (~pre-mid 2018) shipped with a flawed PCBA that had an interference fit between the +5v 2-pin connector and the heatsi …