Lenovo ThinkPad T550 User Manual page 67

– ThinkPad Pro Dock
– ThinkPad Ultra Dock
• For the ThinkPad Ultra Dock, a maximum of three displays (including your computer display) can work at
the same time. As a result, if you connect three external displays to the ThinkPad Ultra Dock, the display
connected to the VGA connector will not work when your computer display is on.
– When the computer display is off:
– When the computer display is on:
51
.
Chapter 3 Enhancing your computer