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Thank you for the information.
Turn Off the printer. Disconnect the phone line from the printer.
Unplug the printer from the power too (note: if it can't switch Off, just unplug it from the power anyway, sharply and suddenly.)
Then leave the printer for at least 30 minutes.
Then plug in to the power (not the phone line, though), and see if it can Copy, or even Print a one-page test page.
Let me know how it goes - and what your printer's maker and model # ***** ***** and I will help you further through the problem. You may communicate with me using the Reply function.