Table of Contents
Advertisement
Table 9. LED codes (continued)
Diagnostic light codes
2,1
2,3
2,4
2,7
2,8
3,1
3,3
3,4
3,5
Camera status light: Indicates whether the camera is in use.
● Solid white—Camera is in use.
● Off—Camera is not in use.
Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.
● Solid white—Caps Lock enabled.
● Off—Caps Lock disabled.
WiFi power cycle
About this task
If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be
performed. The following procedure provides the instructions on how to conduct a WiFi power cycle:
NOTE:
Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
82
Troubleshooting
Problem description
Processor failure
No memory or RAM (Random-Access Memory)
detected
Memory or RAM (Random-Access Memory)
failure
LCD failure - SBIOS message
LCD failure - EC detection of power rail failure
Coin-cell battery failure
Recovery image not found
Recovery image found but invalid
Power-rail failure
Recommended solutions
Run the Intel CPU diagnostics tools. If
problem persists, replace the system board.
Confirm that the memory module is installed
properly. If problem persists, replace the
memory module.
Reset and swap memory modules amongst
the slots. If problem persists, replace the
memory module.
Replace display vable (EDP) if possible,
otherwise replace the display assembly
(LCD).
Replace the system board.
Reset the CMOS battery connection. If
problem persists, replace the RTC battery.
Flash latest BIOS version. If problem persists,
replace the system board.
Flash latest BIOS version. If problem persists,
replace the system board.
EC ran into power sequencing failure. If
problem persists, replace the system board.
Advertisement
Table of Contents
