Recently my computer screen starting going blank without any warning. One minute it is fine and I am working away, then the screen turns black and no key sequence will bring it back. I have selected a power scheme that has never, never, never set in the categories. I also sent my screen saver to None. I took it to Staples to run a diagnostic which responded with no errors. Within 15 minutes of running, the screen was blank and the computer was unresponsive.
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