i think this has been posted before but my issue is slightly different.
I installed Warcraft 3 again today everything went fine until i click play the screen goes off (into standby mode) but i can still hear the music and even click on the screen i just cant see the picture.
I havent had this problem before nor have i upgraded my computer recently, i can play most games (just not to the best of there abilities)
like Doom 3 etc
I have a 1.5 pentium Processor with 384 ddr ram with a geforce 3 ti-200 Graphics card.
I had the same problem with w3 when I had onboard (prosavage) video. I never knew what caused it. Maybe it has something to do with the refesh rate of the monitor. N E ways, once I got my radeon for it i no lonnger had it as an issue.