Dell™ Latitude™ XT2 XFR Service Manual
Page 90 of 94 Version A00-01
If the USB device test fails the Camera only, replace the Camera module. If the ping test does not
recognize a Camera module is attached, a replacement USB hub board may be needed or the USB
cable checked for proper connection. If no USB devices are present, replace the system board.
Device status LEDs are a good source for diagnosing common problems that may occur on
your XT2 XFR.
Turns on when you turn on the XT2 XFR and blinks when the XT2
XFR is in a power management mode.
Turns on when the XT2 XFR reads or writes data.
Turns on steadily or blinks to indicate battery charge status.
Turns on when wireless networking is enabled.
Turns on when a card with Bluetooth® wireless technology is
enabled. To turn off only the Bluetooth wireless technology function,
right-click the icon in the system tray and select Disable Bluetooth
Radio.
Battery Status
If the computer is connected to an electrical outlet, the battery light operates as follows:
• Alternately blinking amber light and blue light — An unauthenticated or unsupported,
non-Dell AC adapter is attached to your XT2 XFR.
• Alternately blinking amber light with steady blue light — Temporary battery failure with
AC adapter present.
• Constantly blinking amber light — Fatal battery failure with AC adapter present.
• Light off — Battery in full charge mode with AC adapter present.
• Blue light on — Battery in charge mode with AC adapter present.
Battery Charge and Health
To check the battery charge, press and release the status button on the battery charge
gauge to illuminate the charge-level lights. Each light represents approximately 20 percent
of the total battery charge. For example, if four lights are on, the battery has 80 percent of
its charge remaining. If no lights appear, the battery has no charge.
To check the battery health using the charge gauge, press and hold the status button on the
battery charge gauge for at least 3 seconds. If no lights appear, the battery is in good
condition and more than 80 percent of its original charge capacity remains. Each light
represents incremental degradation. If five lights appear, less than 60 percent of the charge
capacity remains, and you should consider replacing the battery.