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If the issue persists, then please follow the steps mentioned in this document:
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Click here to download and install the latest printer firmware and drivers from your product.Turn on the printer and wait till the warm-up period finishes and the printer is idle.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.
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I understand you are facing an issue with your drivers for HP Deskjet 6840 Windows 10 圆4. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.Printing Errors or Lights & Stuck Print Jobs.Notebook Hardware and Upgrade Questions.
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