Here's how I made my motherboard test jig. I took a motherboard shipping box (Asus in this instance) then, using an old ATX motherboard, I marked the screw holes and mounted four bolts in place. Then I set  rubber faucet washers over the nuts as insulators. Changing 
motherboards couldn't be easier: lift one off and set another one on.      

Here's how the jig looks when a motherboard is in place with all its cables connected.

This is a FIC AZ31 board built to Compaq UWAVE2 specifications, used in some Presario and perhaps other Compaq computers. Unlike many ATX boards I've seen, this one is built like a military tank. Its Bios is by SST, hardwired to the board so the Bios IC is unchangable.

Thus far I've been unable to find any bios flash updates for it so it's WYSIWYG. It will do fine as a replacement PC board for anyone who has a bad older ATX board using SDRAM memory, and who doesn't mind having the Compaq splash screen pop up before your eyes everytime you reboot. This logo is programmed into the BIOS and  permanent. 
There are many of these boards available. I've found them priced all the way from $25.00 to $95.00 for the board only (less memory, CPU, etc.) plus shipping. I wouldn't take less than $40.00 for this one (installed, if you bring the computer to me).     howdougd@yahoo.com

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12/06/06. Sorry. Too late. I used this board in a computer that I gave to someone who needed it. I replaced it on my jig with a Biostar M7VKQ, running Ubuntu Linux 6.06 LTS.