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1. Emergency-reset hole
If the computer stops responding and you cannot turn it off by pressing the power
button, reset your computer:
1. Disconnect your computer from ac power.
2. Insert a straightened paper clip into the hole to cut off power supply temporarily.
3. Connect your computer to ac power and then turn on your computer.
2. Speakers Play sound.
8 L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen User Guide