I had the common problem of charger being plugged in but not charging, I tried all the reboot and tapping the power button etc, etc... None worked, so as long as the computer worked when plugged in I carried on, until now. It has completely died on me now, so help...
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What's going on when you press the power button?
That 'has completely died on me now' isn't giving us much of an idea what might be happening with the laptop.