So I purchased a via TC10000 mother board and the proper NoN-buffered ram and put the rest of the hardware all together. Used a CarNetix to regulate the power and started everything up and i got nothing. I mean nothing in the way of no responce from the mother board. Hell the processor fan didnt even turn on. I proceeded to order another board and decided to hang onto the non operation board till I knew the new one was a good board. Believe it or not the next board did the same thing besides the processor fan did turning?!?! I even went and purchased a different type of ram and still nothing. After becoming very frustrated I decided to go with a MKII120000 board instead and powered it with the Opus 90watt. Did I miss somthing or is it possible to have 2 new motherboards be bad??
I had this problem, but the opus(150) was blinking two quick pulses when acc was hot. Looked it up in the manual and the power on leads to the MB were reversed. I thought it was strange that it should matter since when I had it connected to a standard power supply I was turning it on by shorting the power pins with a screw driver. I think the opus sends a low power supply to one of the pins instead of actually closing the circuit like a normal switch. Probably not your same problem since you have used different power supplies and on switches.
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I've had this problem with a different motherboard (Abit). Turned out it was bad RAM. I would strip everything down to a minimum and try different RAM and a standard ATX PSU.
tried to sets of ram and 2 motherboards. still no luck so i decided to go with another mother board and power supply set up. All works fine but I'm still confused why we couldn't get the first set up to work..!