Please click “ Accepted Solution ” if you feel my post solved your issue, it will help others find the solution. If the issue persists, then please follow the steps mentioned in this document: Click here to know different methods of updating printer firmware.Click here to download and install the latest HP Print and Scan Doctor.The download has been tested by an editor here on a PC and a list of features has been compiled see. HP Print and Scan Doctor is a freeware diagnostic scanner app and printer program, developed by Hewlett Packard for Windows. Turn on the printer and wait till warm-up period finishes and the printer is idle Diagnose, solve issues and troubleshoot HP printers and scanners in this intuitive and wizard-based support application.Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord ( This is important) and then plug back the power cord to the printer.Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.Not to worry I will help you to get a resolution to resolve the issue. I understand you are facing an issue with your HP ENVY 7640 E-All-In-One Printer. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.Depending on the problem, click either Fix Printing or Fix Scanning. If there is a connection problem, follow the instructions in the tool. If your printer is not listed, turn it on and click Retry. ![]() Once HP Print and Scan Doctor is open, click Start, and then choose your printer. ![]()
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