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Dunc

Epson 3720 won't connect USB in Update Mode

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Newest Epson firmware update (Ver CL27J9) caused printer to not recognize the previously acceptable cartridges. I got it into "Update" mode, connected the USB cable, but my Dell laptop/Win10 does not connect to the printer so no Firmware Update can be done. I disables the working WiFi connection, but still no help. 

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Good day.

What exactly is happening?

USB device does not recognized by system at all? Recognized incorrectly? Could not find appropriate drivers?

Also, try to change USB cable and port first.

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