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That is a general failure message.
I suggest turning it Off, unplugging it, and leaving it for overnight (or 5+ hours continuously), and see if it works after that, if only for awhile.
Let me know how it goes... also while it is Off, do a general glance over the inner parts of the printer, as much as you can see, and try to gather more data as to what could have caused the problem. And let me know also, how old the printer is, please. Thanks.