Help! I am using WINNT4. the problem started when my sister uploaded a file from a diskette. Suddenly the monitor went black. ..nothing. I rebooted it then it was ok so far until the desktop is supposed to appear. . .black, nothing can be seen. CPU is still running but monitor is not. The reason why I am on this thread now is that I chose the VGA mode option. What has happened? Can anyone please tell me? Thanks very much.