mini ATX supply problem

Btw.. out curiousity. Could you provide a photo of the pcb flipped to the other side than that in the supplied product brouchyre?

Asfair (+) is in the middle. And (-) is the "shield" (if plastic counts :). Verfify with multimeter. And verify the connections on the pwr supply. Due the funny habbit of royal mess of DC plug volts and +/- orientation.

Which power switch pins?

That brief 12V*15A could been something overheating. It doesn't neccesarly have to blow up. Just melting the P/N layers could make it faulty.

I hope you had the mobo+cpu connected at minimum. Because switched pwr supply (if that's the case) can be very unhappy about such things.

Tell us if the mobo worked. Because it limits the possible sources of fault.

Maybe in a few days, once I can get hold of a digital camera. Nothing looks completely cooked, though four of the chips look a bit 'dirty' on close inspection. These chips read: FA0348, FDD, 6880A

In the instruction manual it says that the center is the positive, the tech told me which wire on the plug he made was positive. lol just now I got paranoid and had to pull apart the plug, its all good, center was +. I hooked up the center to + on the lab supply and the outer to -.

The ones that you would connect the frontpanel of the case to on the MB, this runs to the ON switch that would have been on the case, but since I didnt have one, I read up on it and found that you could short the pins momentarily. It works with the regular ATX supply.

but it did that every time (i only tried it 3 times on the large power supply - wasnt game to do it more than that with uni equipment). The manual said any 12V DC source, shouldn't it just pull as much current as it needs?

at minimum? I put ram in and tried that and later hooked up a HDD (because I also read that some ATX supplies wont start without another 'load'). The board has a cpu in it too.

Yes, the mobo worked and I installed an OS onto it. lol since I didnt have a frontpanel, I had to switch it on and off with a screwdriver shorting the pins.

Looks like I will be testing the supply today :(

Any additional help would be appreciated.

I've worked with some (AT-style, mainly) supplies before that regulate based on the 5V load. Connecting just the +12V supply does not do the trick. If yours is similar, you could try putting a small load (1K resistor or such) on the 5V or 3.3V lines and see if that improves things.

Thanks for your input Travis,

I understand what you mean but I dont know 'where' you mean. I plugged a HDD into it which didnt really change things, and HDD's are quite a load!

This thing was plugged into the MB when I was testing, probably not smart but I was impatient. The MB is ok as it turns out.

I dont really want to attach resistances between the ATX supply and the MB just in case that causes the MB to fire up unsafely, thusly voiding the warranty.

This ATX supply should be a stand-alone supply (as it is advertised), the instructions say +12V DC into the supply, hook it into the MB, stick in a HDD and it should work. Maybe instead of a lab supply I should go for a 12V out power pack as it suggests, but it also says that any supply will do.

I believe it to be the fact that I had overload protection on the lab supplies, with a powerpack it may allow it to draw the necessary current. I will let you all know how it goes!

Thanks aga> > > >Hi all,