Dell Inspiron 2500 - Manual (Page 59)

The AC adapter converts AC power to the DC power required by the computer. You can connect the AC adapter with your computer either turned on or off.
PS/2 Connector
Video Connector
Parallel Connector
USB Connectors
Serial Connector
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HINT: Although the AC adapter works worldwide, power connectors vary among countries. Before using the AC adapter in a foreign country, you may
need to obtain a new power cable designed for use with the electrical outlets in that country.
NOTICE: When you disconnect the AC adapter from the computer, grasp the adapter cable connector, not the cable itself, and pull firmly but gently to
avoid damaging the cable.
Use this connector to attach PS/2-compatible devices such as a mouse, keyboard, or external numeric
keypad to your computer.
Use this connector to attach an external monitor to the computer.
Use this connector to attach a parallel device, such as a printer, to the computer.
Use these connectors to attach USB-compatible devices such as a mouse, docking device, keyboard,
printer, or scanner to your computer.
Use this connector to attach a serial device, such as a palmtop, to the computer.