I have an HP Laserjet Pro 400 M425dn. I am connected to a wired company network, running IE10 and Windows 7-64 bit (Enterprise). I have had this All-In-One unit for some time (couple of years?). When I installed the software, everything worked well. Recently, I get the same fatal error message I have been reading about in this forum when I try to fax from the desktop. Printing and scanning work perfectly but an attempt to fax from desktop returns the "Unable to communicate with device: Device may be disconnected, powered off or its network settings may have changed". It would seem to me that if any of these conditions existed, I wouldn't be able to print or scan. I can fax from the control panel on the device, so I know it is working. I have a very capable IT department that can usually fix any problem but this one has them stumped. We have tried everything suggested in the forums; Un-installed and reinstalled the software, made the fax my default printer, entered the IP address instead of the device name in the device settings, re-booted the device and the computer (this has been going on for some time and the computer gets re-booted daily). None of these suggestions have worked. There have been no major upgrades or changes in the operating system since this was first installed other than maybe the Java version (Currently V6.32). In all my reading, I have not seen any solution to this issue and some of the posts are quite old. Can you give me any new suggestions or fixes for this problem? Thank You
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