Dell Vostro A100 Setup And Quick Reference Manual page 26

Specifications
Connectors (Continued)
Power 12V
Power
Controls and Lights
Front of computer:
Power button
Power light
Drive activity light
26
Vostro A100
one 4-pin connector
one 24-pin connector
Vostro A100
push button
blue light — Power on state
blinking blue light— Standby state
off (no light) — Power off state
blue light — A blinking blue light
indicates the computer is reading data
from or writing data to the SATA hard
drive or CD/DVD.
Vostro A180
one 4-pin connector
one 24-pin connector
Vostro A180
push button
blue light— Power on state
off (no light) — Power off and
standby states
blue light — A blinking blue light
indicates the computer is reading
data from or writing data to the SATA
hard drive or CD/DVD.