Dell WD19DC User Manual page 31

• Our Dell dock is designed to operate on AC power only and it does not support system power source back (powered by system
Type-C port). A power loss event will make all devices on the dock fail to work. Even when you restore the AC power, the dock
may still not function properly because the dock still needs to negotiate proper power contract with the system's Type-C port and
establish a system EC-to-dock-EC connection.
Frequently asked questions 31