HP Envy Leap Motion QE CT0 Notebook PC 17t-j100; HP Assistant began an update; screen stated that BIOS was being updated; LED lights flashed then screen went blank. I didn't turn power off. I waited a really long time, but the PC never booted up again. I later turned system off and turned it back on several times. "On" light glows, but screen remains blank. How do I revive my poor laptop?
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