I keep this machine as a backup and power it up a few times a year to update Vista. I left in on overnight to run the latest Avira and Malwarebytes. This morning the blue power light was on, but the screen was dark, and I couldn't awaken it with the keyboard or mouse. I did a manual power-off, then powered it back on. The fans come up at high speed, but there are no beeps or keyboard flashing. The fans stay on high. Seeing how it was running yesterday, does this sound like a PS, Mobo, RAM, or what? I'd appreciate advice on troubleshooting. Thanks
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