I saw a couple of blank screens while playing NA2004 yesterday. If I remember correctly, they occurred after I failed to reach my target objective in time to perform the assigned mission. (See
http://www.subsim.com/radioroom/show...&postcount=114 for why I was late to the party)
Once I received orders to return to Holy Loch to repair/rearm when I had no damage and a full weapons load out.