I'll leave and the screensaver will be on, but when I get back, the screensaver has shut off automatically, and there's my desktop which has been static for who knows how long

Mine started doing that this week as well. Haven't changed a thing, either. I turn my monitor off now too...
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Dave Clark Georgetown, Texas MK2A 42Gb - AnoFace - Smoke Lens - Dead Tuner - Sirius Radio on AUX