Service Manual

Table 10. LED codes(continued)

Diagnostic light codes Problem description

2,3 No memory or Random-Access Memory (RAM)

detected

2,4 Memory or Random-Access Memory (RAM)

failure

2,5 Invalid memory installed

2,6 System board or chipset error

2,7 Display failure

3,1 Coin-cell battery failure

3,2 PCI, video card/chip failure

3,3 Recovery image not found

3,4 Recovery image found but invalid

3,5 Power-rail failure

3,6 System BIOS Flash incomplete

3,7 Management Engine (ME) error

Camera status light: Indicates whether the camera is in use.

• Solid—Camera is in use.

• Off—Camera is not in use.

Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.

• Solid—Caps Lock enabled.

• Off—Caps Lock disabled.

Flea power release

About this task

Flea power is the residual static electricity that remains on the computer even after it has been powered off and the battery has been

removed. The following procedure provides the instructions on how to conduct flea power release:

Steps

1. Turn off your computer.

2. Remove the

base cover.

3. Remove the battery.

4. Press and hold the power button for 15 seconds to drain the flea power.

5. Replace the

battery.

6. Replace the base cover.

7. Turn on your computer.

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.