A detailed account of repairing Nespresso Vertuo Next coffee machines reveals common failure points in the barcode scanning system. Two machines with capsule reading errors were diagnosed through full teardowns, discovering that one was missing a lens assembly over the photodiode and IR LED, while the other had coffee-gunked lenses. The repair process required complete machine disassembly to access the optical components. One machine was successfully restored to working condition, though the other had an additional unresolved fault despite extensive debugging.
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