Embodiments generally relate to a universal debug design which involves integrating a debug controller and a debug card with display together into a single debug design. Debug codes, such as power-on self-test (POST) codes and other error codes, are generated by various subsystems of a server-related system. The codes are transmitted to a controller, which stores the codes in memory. In some embodiments, a multiplexer outputs one debug code from the multitude of received codes, based on a user or event selecting which desired debug code should be displayed. In some embodiments, a decoder converts and sends the LED display signals to a debug card, which displays the debug code on a 7-segment LED display.