My friend is using remote desktop to log into her work pc every once in awhile. The problem she is having is the morning after she logs in, she goes in to work and it has the normal login screen. When she hits ctrl alt del to login, the screen goes black and then says no signal. She claims that she has to power off the PC and then power it back on to get any response but today someone was on her PC and said they came back a half hour or so after it went black and just turned the monitor off and on and it came back. Any ideas as to what may be causing this or how to fix it? I've never seen this before.