My sons HP Envy 15 notebook has come home from school apparently dead. Was working until midday. Lid closed and then put away for lunch. After lunch opened up in class, and dead. Now at home. Have walked through all the prcedures online to no effect. It is now plugged into the mains power. The only light is a white led next to the power port indicating (I suppose) that the PC is receiving power. There are no keyboard lights, nothing onscreen, no fan or disk spinning sounds. With battery in, the white LED turns orange (presumably indicating battery charging).
Is this a dead PC?