I ***THINK*** I have run into this motherboard. This is a full ATX board?
Check the power supply connector, counting its "pins". IIRC, it is 24-pin,
rather than the more usual 20-pin ATX connector of that era. I had some that
used 800MHz Pentium 3 CPUs. The SCSI LED and LOOPBACK jumpers are not critical.
The pinout from the motherboard to the front panel (on-off momentary switch,
power-on LED, HDD active LED) is something I cannot remember... Ben Myers

On Mon, 30 Jun 2008 15:20:35 +0100, "Peter Allison"
wrote:

I have acquired three Socket 370 motherboards, marked 305 Rev0AS21, also
with part numbers 011305-101 and 011306-000.

From what I can tell these are the basis for a Deskpro SB (?) machine, but
none of them will boot! They have on-board graphics, and a memory card
marked "4Mb AIMM 133Mhz CL3" is provided for the AGP slot.

I have tried various processors and memory sticks - the LEDs on the board
light when I plug in the PS and trip the 'power on' pins, but no boot!
I notice that some of the pins to the panel are marked SCSI LED and
LOOPBACK - are either of these crucial to the boot sequence?

Any help appreciated!!

Peter Allison
Swindon, UK.