This Interactive POST Code Diagnostics Decoder is intended to assist in troubleshooting a system hang during a system's Power-On Self-Test (POST) process. Intel Server Boards include a bank of eight POST Code Diagnostics light-emitting diodes (LEDs) at the back edge. As each routine is started, the given POST code number is displayed to these LEDs.
During a POST system hang, the displayed POST code can be used to identify the last POST routine that was run prior to the error occurring, helping to isolate the possible cause of the hang condition. Each POST code is represented by eight LEDs divided into two nibbles, an upper and lower nibble. The upper nibble bits are represented by amber diagnostic LEDs and the lower nibble bits are represented by green diagnostic LEDs.
If the bit is set, the corresponding LED is lit. If the bit is clear, the corresponding LED is off.
(Continue selecting LEDs to decode POST Code.)