Question : Display gets fuzzy then blank.  Graphics card? Monitor?  Some connection in between?

GPU is BFG GeForce 7900 GT-OC card.  A little over a year old.  Samsung Syncmaster 206bw monitor.  My guess is the card but want to get The Experts advice before changing cards.  The card has worked flawlessly until now.  By "blank" as I described above, I mean it appears to get no signal.   I had 2 cards in SLI when I initially built it.  Found the one did just fine (thanks to Gary Case).  This problem started about a month ago.  We leave our pc on most of the time. But monitor goes to screen saver after 10 min then off after 30 (kids on and off all day....actually the kids could be the problem).  Runs fine most every day.  I though my wife had some sort of issue with my pc (she wants a mac) because the first 15 or so times it happened to her while I was at work or in another room.  I has happened to me once.  Strange thing is that most every time I can recall, it happened in Word.  Not 100% sure it was every time but I know it was when it happened to me and tonight my daughter, while writing a report.  Luckily word autosaved her progress.  I know it happened several times when my wife was using word to update our Christmas mailing list.  Anthoer strange thing is that it seems to happen when using a command either from the toolbar or a shortcut.  Tonight was ctrl+f.  I don't remember mine, but wife's had something to do with formatting lables.  I think select all.  (Doubtful she used shortcut).  Hope I'm not throwing in a red herring there.  I still think card but needed to mention Word just in case.  We've watched videos, played games and such with no problem.  (Starting to think it's Word)  Wife just confirmed it always happens in Word.  So there it is.  I'm clueless now.  I used to have the card slightly overclocked (just to say I did), it was nothing extreme by any means.  When this first happened I took it back to default.  I did test it's limits on one benchmark but that was about a year ago.  Could be latent issues related to that but doubt it..  While writiing, I've talked myself into the Word bug theory.  Any ideas?

Answer : Display gets fuzzy then blank.  Graphics card? Monitor?  Some connection in between?

I obviously forgot about this open question.   The problem has stopped happening.  Found the reminders in the blocked emails.  

Since I did use some of the advice from these experts I will award the point.

Thanks as always and again my apologies.