Error: "unable to communicate with the TWAIN device" with brother MFC7820N

Original title: can I connect a scanner through a switch?

I'm trying to analyze something like I did it many times with my brother MFC7820N hung on my tablet. But recently, I replaced a 2nd router I had in my system that failed with a new Dynex switch.

I have my internet modem and 2 computers connected to a Linksys wireless router. I have another ethernet cable connecting the router to a new switch. I have my 2 printers attached to the switch. One is a Brother HL-2700CN color laser and the other is a brother MFC7820N mutli-function. It use PaperPort to scan stuff on him, since provided on the CD with the device.

So today I open PaperPort and click the Scan button and it appeared an error saying unable to communicate with the TWAIN device box.

So I clicked on a doc shown in PaperPort that I had scanned a few weeks ago and I click right and select Print and printed to this MFC7820N.

Then I come back to click on scanner again and yet again, it appears that box. So I watch and WIA-Brother MFC-7820N LAN is displayed in the Scanner marked drop-down list box. So I switched the power of the MFC and tried again and it still appeared that same box again.

OUCH! I'm going nuts! You have any ideas?

Hi Jeff has Davis,
 
Method 1: Uninstall and reinstall the driver again and check if it helps fix the problem.
 
See this article for more information:
 
Method 2: Try the suggestion given in this article:

Tags: Windows

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