Chapter 5: Troubleshooting Your Computer; Device Status Lights; Battery Status Lights - Dell Precision Mobile M4800 Manual Del Usuario

You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the operation
of the computer.

Device status lights

Table 13. Device status lights
Turns on when you turn on the computer and blinks when the computer is in a power management mode.
Turns on when the computer reads or writes data.
Turns on steadily or blinks to indicate battery charge status.
The device status LEDs are usually located either on the top or left side of the keyboard. They are used to display the storage,
battery and wireless devices connectivity and activity. Apart from that they can be useful as a diagnostic tool when there's a
possible failure to the system.
The following table lists how to read the LED codes when possible errors occur.
Table 14. LED lights
Storage LED Power LED
Blinking Solid
Solid Blinking
Blinking Blinking
Blinking Blinking
Blinking Blinking
Blinking Off
Solid Blinking
Blinking Solid
Off Blinking
Off Blinking

Battery status lights

If the computer is connected to an electrical outlet, the battery light operates as follows:
Alternately An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop. Re-plug battery
blinking amber connector, replace battery if the issue reoccurs.
light and white
light
Alternately Temporary battery failure with AC adapter present. Re-plug battery connector, replace battery if the
blinking amber issue reoccurs.
light with steady
white light
66 Troubleshooting your computer
Troubleshooting your computer
Wireless LED Fault Description
Solid A possible processor failure has occurred.
Solid The memory modules are detected but has encountered an error.
Blinking A system board failure has occurred.
Solid A possible graphics card/video failure has occurred.
Off System failed on hard drive initialization OR System failed in Option
ROM initialization.
Blinking The USB controller encountered a problem during initialization.
Blinking No memory modules are installed/detected.
Blinking The display encountered a problem during initialization.
Blinking The modem is preventing the system from completing POST.
Off Memory failed to initialize or memory is unsupported.
5