Lost communication with printer

Hello, I have a problem with HP Multifunction device. When I open HP Solution Center and try to scan a document it says that the communication with the printer is lost, but I can print without any problem. The printer is 2840.
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goliveukAuthor Commented:
I review this page, but there was not the same error. I talk to HP, and they said to change the IP address to static and that should solve the problem, but nothing happens when I did it.
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