Larry The MB is a VTech MB500N and has an Award Modular BIOS v4.50PG, but the MB itself is well labelled and everything is marked. The problem is the wires in her new box are not labelled. There's no manual coz she got this box off a dead computer. The only label on the box is LogIQ but I couldn't find out who makes it. Volkard I did think of following the wires to see where they go but the whole bunch disappears behind a sort of metal plate and the bracket for the HD, floppy etc then go on top of that. I'm not confident enough to dismantle the whole thing, which is why I was hoping there's some standard industry code for LED color combinations. Even if someone can tell me what each color combination USUALLY is, that would narrow things down a bit. Cathy __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml