Owners Manual

Display built-in self test
About this task
The following procedure provides the instructions on how to run the built-in self test for the display:
Steps
1. Turn off your computer.
2. Press and hold the display built-in self test button.
3. Press and hold the power button.
4. Release the power button.
5. Hold the display built-in self test button until the test starts.
Diagnostics
Power status indicator light: Indicates the power status.
Solid amber—The system is unable to boot to the operating system. This indicates that the power supply or another device in
the system is failing.
Blinking white—The system is unable to boot to the operating system. This indicates that the power supply is normal but
another device in the system is failing or not installed properly.
NOTE: See the light patterns to determine if the device that is failing.
Off—System is in hibernation or turned off.
The power status indicator blinks amber along with beep codes indicating failures.
For example, the power status indicator 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 system is turned off indicating the Recovery image is not found.
The following table shows different light patterns and what they indicate:
Table 19. Diagnostic LED behavior
Blinking pattern
Problem description Suggested resolution
Amber White
1 1 MBIST: TPM Detection Failure Replace the system board.
1 2 MBIST:SPI flash, Unrecoverable SPI flash
failure
Replace the system board.
1 5 i-Fuse: Failure EC unable to program i-Fuse Replace the system board.
1 6 EC internal: Failure Generic catch-all for
ungraceful EC code flow errors
Disconnect all power source (AC,
battery, coin-cell) and press and hold
the power button to drain flea power.
2 1 Processor failure Run the Intel CPU diagnostics tools. If
problem continues, replace the system
board.
2 2 System board: BIOS or ROM (Read-Only
Memory) failure
Flash the latest BIOS version. If problem
continues, replace the system board.
2 3 No memory or RAM (Random-Access
Memory) detected
Check and confirm that the memory
module is installed properly. If problem
continues, replace the memory module.
2 4 Memory or RAM (Random-Access Memory)
failure
Reset the memory module. If problem
continues, replace the memory module.
100 Troubleshooting