suddenly, my computer wont come out of power save mode when I start it. At least that's what the display says. monitor works fine when I unplug it from the computer, but then goes off when I plug it in to the computer. It says its in power save mode and I should push any key to wake it up, but nothing happens. the screen stays blank, but the computer is on. I've already replaced the video card and same result. what could be going wrong with my computer? Please help.
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