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Hi,My name is ***** ***** I will help with your question. Please could you try this make sure that the printer is turned on. Press & hold the [Wi-Fi] button on the top of the printer until the alarm lamp flashes once. Make sure that the lamp next to this button starts to flash blue and then go to your router and press the [WPS] button within 2 minutes.
Have you tried to reconnect the printer to the wifi again?