1. A computer system comprising: an I/O module installed in the computer system; one or more memory modules installed in the computer system; a CPU module installed in the computer system and performing diagnostic testing on each of the I/O module, the one or more memory modules, and the CPU module, the diagnostic testing for each module producing diagnostic results indicating either that the module has passed diagnostic testing and is fully functional when installed in the computer system or that the module has failed diagnostic testing and is not fully functional when installed in the computer system; a console panel comprising LED's visible to a user, each LED electrically coupled to the CPU module and corresponding to one of the CPU module, the I/O module, and the memory modules, such that for each LED, the LED is unlit when the diagnostic results for the corresponding module indicate that the module has passed diagnostic testing, and the LED is lit when the diagnostic results for the corresponding module indicate that the module has failed diagnostic testing.