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HP OfficeJet Pro 7740 Wide Format All-in-One Printer
Microsoft Windows 10 (64-bit)

I purchased a HP 7740 in April 2021 and just recently have been getting an error message that reads, "Memory Device Problem, A problem with the USB device has occurred. remove the USB device, and then restart the printer." I haven't used an USB device with the printer. I have followed the other threads that talk about this same problem and the recommendations to perform a shut down of the printer by first removing the plug from the back of the printer, then the wall, waiting a couple of minutes, and then reattach the plug to the wall and then to the back of the printer. When the printer turns on, I still get the same error message. I have also used the control panel to perform  a factory reset (a couple of times) and I keep getting the same error message as soon as the printer is turned back on. I see from some of the other discussions that people have posted with the same problem, an HP employee replied that they would send a specific reset sequence via a DM. Can I please get those instructions because my other attempts have failed. Thanks.

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