你的LAPTOP很可能在冬眠.Press the power key should wake your laptop up.
To reset, some leptop has a reset button. It might be in a small hole and you need a pin to reset it. Or, press and hold power button till you see the power light goes off then back on (usually more than 5 seconds).
If that doesn't work, do what 日夜 said.
Good luck.