Dell Latitude E5500 - Manual (Page 27)

Troubleshooting
27
Troubleshooting
CAUTION:
To guard against the likelihood of electric shock, laceration by moving
fan blades, or other expected injuries, always unplug your computer from the
electrical outlet before opening the cover.
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions that shipped with your computer.
Tools
Power Lights
The two-color power-button light located on the front and on the top cover of
your laptop turns on and blinks or remains solid to indicate different states:
• If the power light is off, the computer is either turned off or is not
receiving power.
• If the power light is steady blue and the computer is not responding,
ensure that the display is connected and powered on.
• If the power light is blinking blue, the computer is in standby mode. Press
a key on the keyboard, move the mouse, or press the power button to
resume normal operation. If the power light is blinking amber, the
computer is receiving electrical power, a device such as a memory module
or graphics card might be malfunctioning or incorrectly installed.
Beep Codes
Your computer might emit a series of beeps during start-up if the monitor
cannot display errors or problems. This series of beeps, called a beep code,
identifies a problem. One possible beep code consists of repetitive three short
beeps. This beep code tells you that the computer encountered a possible
motherboard failure.
If your computer beeps during start-up:
1 Write down the beep code.
2 Run the Dell Diagnostics to identify a more serious cause (see "Dell
Diagnostics" on page 36).