There is a warning pictogram in front of the VGA for projector and of the DVI, so I thought it meant that some kind of upgrade had to come...
I was wrong and your are right, Dear Vienna!
I connected the DVI of my computer to the one of the BV7, set the connections for AV4 to PC and nothing happened, then I tried several options, mostly because of your post.
What worked is: link the computer to the BV7-32 mkI with the DVI, link the computer to another screen
shut the computer down and fire it again while the beovision is already set on PC and on. Then the BV7 notices that something happens on his DVI-port and the computer notices too that the BV7 exists. With the second screen you easily set the right resolution and then you can unplug the additional screen.
The result is a very, very impressive screen, especially when running linux. I would not work on it all day (although..) but it solved my DVD-dezoning problem (under Linux my computer can read any DVD) and it is a great place for my kids to go on the internet.
Many thanks for your good advice. I wish you a merry Christmas
François from Fribourg