Acer TravelMate 4220 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 20

Status Indicators The computer has several status indicators for monitoring various system components and functions. Number 1 Icon Indicator Hard drive activity Description Flashes green when there is hard drive activity. 2 Num Lock Lights up green when the Num Lock function is activated. 3 Caps Lock Lights up green when the Caps Lock function is activated. 4 Power * Indicates the computer's power state. It lights up: T Green when the computer is powered on. T Amber when the computer is in standby or hibernation mode. 5 Battery charge * Indicates the battery charging state. It lights up: T Amber when the computer is charging. T Green when battery charging is complete. 6 Bluetooth * Indicates the Bluetooth status. It lights up: T Green when there's an active Bluetooth connection T Amber when there's no Bluetooth connection. 7 WLAN * Indicates the WLAN status. It lights up: T Green when there is an active WLAN connection T Amber when there is no WLAN connection. * These indicators remain visible when the computer lid is closed. 10 Chapter 1