How do I reset my HP Deskjet Ink Advantage 3630 All-in-One Printer to factory settings?
Press and hold the Power button for 10 seconds until the LED flashes red. This will clear all settings and return the device to its original factory defaults, requiring you to re-pair any connected devices afterward. (Page 23)
From the official HP Deskjet Ink Advantage 3630 All-in-One Printer manual, page 23
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