Diagnostic LED Display 78h DXE ACPI Initialization Error

The diagnostic LED always displays 78h DXE ACPI (Advanced Configuration and Power Interface) Init and the server would not POST (Power On Self-Test).

1. Verify heatsink is properly attached and has thermal grease.
2. If the system has a heatsink fan, ensure the fan is spinning.
3. Check all system fans are operating properly.
4. Check that the air used to cool the system is within limits (typically 35 °C).
5. Replace the motherboard.

For more information please visit and select the Technical Product Specification for your system: Self-Help Collection of Technical Product Specifications for... (intel.com)