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XPS 17 9720 Service Manual

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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 1. LED codesLED light codes for component issues/failure in the product.
Diagnostic light codes Problem description Recommended Solution
1,1 TPM detection failure Replace the system board.
1,2 Unrecoverable SPI flash failure Replace the system board.
1,5 i-Fuse failure Replace the system board.
1,6 EC internal failure Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing and holding down the power button.
2,1 Processor failure Replace the CPU. If CPU is on-board, replace the system board.
2,2 System board: BIOS or ROM (Read-Only Memory) failure Replace the system board.
2,3 No memory or RAM (Random-Access Memory) detected Reseat and swap memory modules between the slots. If the problem persists, replace the memory module
2,4 Memory or RAM (Random-Access Memory) failure Reseat and swap memory modules between the slots. If the problem persists, replace the memory module.
2,5 Invalid memory installed Reseat and swap memory modules between the slots. If the problem persists, replace the memory module.
2,6 System board or chipset error Replace the system board.
2,7 Display failure - SBIOS message Replace the LCD module.
2,8 Display failure - EC detection of power rail failure Replace the system board.
3,1 System board failure If the problem persists, replace the motherboard.
3,2 PCI, video card/chip failure Replace the system board.
3,3 BIOS Recovery Image not found Flash latest BIOS version. If the problem persists, replace the system board.
3,4 Recovery image found but invalid Flash latest BIOS version. If the problem persists, replace the system board.
3,5 Power-rail failure Replace the system board.
3,6 System BIOS Flash incomplete Replace the system board.
3,7 Management Engine (ME) error Replace the system board.

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