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Samsung ML-2240. I  think it's failing to complete initialisation or some other internal check. No errors shown. Light flashes from red to green, machine whirs, repeats. Trying everything from troubleshooting to install/reinstall fails because whatever the printer is doing - which it does when connected to the computer or not - seems to break the connection. New toner tried but makes no difference. Various restarts make no difference. Any ideas?

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