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Hello, When the printer goes into sleep mode, it wakes up once you start printing or when you press on the touch screen. It could also be a WiFi issue that prevents it from waking up. Sometimes the printer driver thinks the printer is offline because the printer disconnects from WiFi when the printer is in sleep mode. The following document may have a solution to your problem: http://support.hp.com/us-en/product/HP-OfficeJet-Pro-8710/8720/8730/8740-All-in-One-Printer-series/7902032/model/7902033/document/c05083107/ I hope this helps.
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