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T490 and P43s

T590 and P53s

1. Docking-station hook holes	Use the docking-station hook holes to secure a supported docking station.
2. Keyboard drainage hole	Drain out liquid from your computer if you accidentally spill liquid on the keyboard.
3. Emergency-reset hole	If the computer stops responding and you cannot turn it off by pressing the power button, reset your computer: Disconnect your computer from ac power. Insert a straightened paper clip into the hole to cut off power supply temporarily. Connect your computer to ac power and then turn on your computer.