I also have 3 of these brand new boards. (surplus) I have done as much research on them as is available. (very little) I have learned from this also, UNLESS you have the whole computer it came in, don't ask Compaq/HP/MSI for any help. The boards do not exist & they'll bounce you back & forth.
They HAVE to have a Compaq PS. I've tried 2 different ones, which were fairly expensive & now I'm afraid to use them on anything else, cause they're propietary. I have an extensive list of which ones. If anybody needs it, PM or EM me. I don't come here often (even though it's a nice place) so probaly want see a forum post.
My story is about the same. CPU fans run (appears like all the time until you turn off, or unplug, the PS, processor gets warm, & that's it. No video (almost positive board isn't even trying to start)
I've tried several procs, from a Duron 133 to an XP1700. Nothing. The boards ARE compatible with these, it just won't come on. Have also tried 2 monitors with same result. Before I FINALLY found a diagram of the header pins, I tried every combination possible. The only ones that did ANYTHING was the two bottom left ones. (NOT RIGHT ONES-DON'T DO!) Some kind of LED pins or something. They would kill the whole board (CPU fans). Luckily I didn't damage the board.
To keep this from getting too long, I'll wrap this up.
1. You HAVE to use the "Pentium" 4-wire plug, even though its not a Pentium board. (fans don't work if you don't)
2. The correct PS has a "special" 2-pin plug for the pin header beside the ATX 20-pin.
3. This IS NOT a good thing to do at all, but I read in a forum (maybe this one) that a person was able to get one of these boards to boot by leaving the CMOS battery out. When it was in, it was unbootable, like ours. Guess I'll try that next. Can't hurt. If it blows I've got two more useless ones to experiment on.
4. Lastly, these seem like they would be decent boards, with integrated EVERYTHING, if we could just figure out how to use them. Any hints, news, or knowledge is VERY welcome & VERY MUCH appreciated.
I already know they seem like pitiful MOBO's.