< That is also a nice ability. But, BASIC isn't present in 386+ PCs. < Does anyone know if there is some kind of commercial solution to this? It's called POST, the last time I bought a POST board it was 59$ and that was 3 years ago. it displays a two digit code that points to the failed subsystem. IBM systems also displayed a code to the CRT (if working) that also told the problem. Generally I've troubleshot PCs with nothing more than a VOM. Frequently less. Allison