Need help building my HTPC (picoPSU related)

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Balinus Offline
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Post: #1
Hello! Just received all my parts! Smile I'm in the building process and I have some problem figuring out what to do with my picoPSU.

Here's some photos of what I received as a picoPSU :

Part #1
[Image: cimg7539.th.jpg]

[Image: cimg7540u.th.jpg]

Part #2
[Image: cimg7541d.th.jpg]

So, I'm guessing that I need to connect somwhow part #2 with #1 that has all the actual power... but how? I only succeed at connecting the smaller 4-pin (white color), but there's to slot on the ATX 24pin that I can plug it in.

Any hint or help would be greatly appreciated! All picoPSU I see on the web are already connected through hard-soldering!
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Balinus Offline
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Post: #2
Ok, I've connected the smaller 4-pin like this :
[Image: cimg7544.th.jpg]

So, if I'm right, this little 4-pin connector will give power to 1 molex, 1 SATA and the 4pin ATX 12v connector?

edit - There is still the slightly bigger 4-pin that I can't seem to plug into the part #1.... and I guess it's not meant to be connected to the MB.
edit2- Ah... the 2nd white connecter looks like a floppy drive power connector! oups...
(This post was last modified: 2011-11-10 20:42 by Balinus.)
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Balinus Offline
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Post: #3
Ok, it works!

Now, I have another problem. When I connect the PSU, all the fans are spinning and the HDD is "alive". But the computer is OFF! Then I turn the PC and the fans slow down, POST, everthing....

So, how come fans and HDD can be ON, when the PC is OFF??
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eskro Offline
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Post: #4
so your saying its alive!?
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Balinus Offline
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Post: #5
Well, just installed W7.

But, as I said, all the fans are spinning at full and HDD is powered up when the computer is OFF !??
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eskro Offline
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Post: #6
check in BIOS options but, thats weird o.O
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WhiteLighter Offline
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Post: #7
I know you can connect the green wire with the black wire on an ordinary PSU to jump start it even without the MoBo. Maybe on your picoPSU, those wire are in contact with each other? just a thought...
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numb7rs Offline
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Post: #8
It looks like the connector plugs into other places on the picoPSU. Try these? (It should be obvious if it does/doesn't fit.)

If you get the same effect, then the most probable explanation is a fault with the PSU. As it's new, I'd recommend contacting the supplier and getting it replaced.

Asus AT5IONT-I in an A+ CUPID-3 + 2TB Seagate LP + 16GB SSD + Ubuntu + Samba + XBMC

AT5IONT-I Problems? Check out my Motherboard I/O Map for troubleshooting tips.
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Balinus Offline
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Post: #9
The bahaviour happens even if it's only the 24pin ATX that is connected. Though in this case, the HDD is not powered. So, sadly, I also thini it's the PSU.

Alternatively, could it be the motherboard? The USB 2.0 behind doesn't seem to work properly.
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eskro Offline
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Post: #10
yes, can be the motherboard, and thats what i think it is,,,
somehow, electricity travels through it at places it shouldnt,,,
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Balinus Offline
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Post: #11
WhiteLighter Wrote:I know you can connect the green wire with the black wire on an ordinary PSU to jump start it even without the MoBo. Maybe on your picoPSU, those wire are in contact with each other? just a thought...

I would have to open up the picoPSU to see that unfortunatly. I think I might just return the MB and the picoPSU....
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eskro Offline
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Post: #12
PSU is fine i believe
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Balinus Offline
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Post: #13
I'm not so sure. The picoPSU is supposed to be fully ATX compliant. So, when we turn OFF the computer, all voltages should shut down, except for the +5VSB. So, if the fans and HDD are receiving power, it could mean that the picoPSU is not shutting down properly the 12V power.

Well, the MB is at the computer shop, I should have some results later today on the MB. If they can power the MB correctly, the picoPSU will be the only remaining suspect.
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eskro Offline
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Post: #14
farewell, keep us updated!
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