All these companies like there own "standards"... Think of it this way. Even the serial port sockets were different on various mother board manufactures boards and cable sets and were unlikely to work with a different MB. (I know the wires you are talking about are part of the CASE...) Lots of times, the little plugs for the wires have small markings on them to label what they are. I am assuming you looked on both sides for those markings and did not see any. I have various case types, but it has never been real hard (for me) to undo some screws and remove the front plastic cover for the case. (Sometimes they screw AND clip in place. Proceed with caution.) You might need someone very mechanically inclined to help you get it apart, and then trace the wires. Remember too that it might be cheaper to get a new case with proper documentation rather than pay a lot to figure out and use something that is more "trouble" than it is worth. (I would take the time to rip it apart...) Hope this helps. Rick Glazier ----- Original Message ----- From: "catherine williamson" <[log in to unmask]> > 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. PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml