Service Manual

Table 20. BIST outcome

LCD-BIST

The LCD that flashes White, Red, Green, and Blue shows that the display is working fine and there is no fault with the LCD panel.

System diagnostic lights

Battery-status light

Indicates the power and battery-charge status.

Solid white — Power adapter is connected and the battery has more than 5 percent charge.

Amber — Computer is running on battery and the battery has less than 5 percent charge.

Off

• Power adapter is connected and the battery is fully charged.

• Computer is running on battery and the battery has more than 5 percent charge.

• Computer is in sleep state, hibernation, or turned off.

The power and battery-status light blinks amber along with beep codes indicating failures.

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by

a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.

The following table shows different power and battery-status light patterns and associated problems.

Table 21. LED codes

Diagnostic light codes Problem description

1,1 TPM detection failure

1,2 SPI flash failure

1,5 i-Fuse failure

1,6 EC internal failure

2,1 Processor failure

2,2 System board: BIOS or ROM (Read-Only Memory)

failure

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

detected

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

2,5 Invalid memory installed

2,6 System-board or chipset error

2,7 Display failure

2,8 Display failure - Power Rail 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 white — Camera is in use.

• Off — Camera is not in use.

Troubleshooting