OCIA.net takes a look at the Soyo TechAID in their latest review

Well here's something that might just fit the bill. It's a little gadget made by Soyo Group (the same folks that made motherboards) and it's called the TechAID. It's a small diagnostics card that plugs into a PCI slot on any motherboard and reads and displays BIOS trouble codes during POST. Some board manufacturers offer something similar, whether it be diagnostic LED's or beep codes from an onboard speaker. But many brands do not have these features, or are not clear on their meaning, and for those this little device may come in very handy.

Soyo TechAID Review