5
Troubleshooting Your Computer
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.
Turns on when wireless networking is enabled.
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 | Wireless LED | Fault Description |
|
|
|
|
Blinking | Solid | Solid | A possible processor failure has occurred. |
Solid | Blinking | Solid | The memory modules are detected but has encountered an |
|
|
| error. |
Blinking | Blinking | Blinking | A system board failure has occurred. |
Blinking | Blinking | Solid | A possible graphics card/video failure has occurred. |
Blinking | Blinking | Off | System failed on hard drive initialization OR System failed in |
|
|
| Option ROM initialization. |
Blinking | Off | Blinking | The USB controller encountered a problem during |
|
|
| initialization. |
Solid | Blinking | Blinking | No memory modules are installed/detected. |
Blinking | Solid | Blinking | The display encountered a problem during initialization. |
Off | Blinking | Blinking | The modem is preventing the system from completing POST |
Off | Blinking | Off | Memory failed to initialize or memory is unsupported. |
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