Disable SSL and see if it works?
Bit of a puzzler this one. I've got a large international estate of 7835/45/55 devices. Suddenly in some offices we cannot access the web interface any more. Strange thing is when I do a view-source in the webbrowser I see what I normally expect to see except the webbrowser does not render it.
I've tried several different laptops with IE and Firefox.
Any thoughts?