First of all let me say I have never heard a more satsifying beep than my M10000 made this morning.

I had another fiddle with the M1-ATX and have got it to do the following:

1) With no jumpers in (so runs as DumbPSU) as soon as the + and - terminals receive power, its away! The SW terminal makes no difference...is this right?

2) As soon as I put a jumper in any of the positions suggested by the manual, it stops working again!

At least I can fire my system up and work on it but I'm really don't have a clue why the jumpers would stop the power up process...

Andy

PS - Apologies to anyone getting fed up with my PSU problems!