I'm baffled!

[Deleted]

Hey guys

Need to brainstorm a bit. Hope you guys can help.

I am putting together an old self-built computer. It's a different PSU and casing from last time - but the inside is pretty much all the same.

After putting everything together there's no power anywhere. No motherboard lights and no fans moving when I plug in the power cord and turn the PSU on(switch on the back). I've even tried a different PSU(although this only has the regular 20pin ATX plug and the mother board has 24 pins, which is normal?).

So am I looking at 2 broken PSUs or 1 broken and the other not functioning due to only 20pin ATX plug?

Been googling a bit and cant seem to find out. (I'm prolly just blind, but hey)

Thx in advance.

[Lilbruz]

Did you remember to attach the other 4 pin power to the top of the motherboard ? Some card need both the 24 pin (or 20 pin) AND the other 4 pin plug (this 4 pin is NOT the one you use to make the 20 pin power into the 24 pin power)

Also, using a PSu with only the 20 pin if your motherboard needs 24 pin power wont work obviously

[Deleted]

Did you remember to attach the other 4 pin power to the top of the motherboard ? Some card need both the 24 pin (or 20 pin) AND the other 4 pin plug (this 4 pin is NOT the one you use to make the 20 pin power into the 24 pin power)

Also, using a PSu with only the 20 pin if your motherboard needs 24 pin power wont work obviously

The 20 pin thing I wasn't really sure about, but seem to remember reading that its not necessary. Long time ago, so not sure by a long shot.

And yes I connect the "other" 4-pin connector. Did that with both PSUs.

[glo]

The 20 pin thing I wasn't really sure about, but seem to remember reading that its not necessary. Long time ago, so not sure by a long shot.

And yes I connect the "other" 4-pin connector. Did that with both PSUs.

They all need to be connected.

[Deleted]

why not use both PSU's at the same time? one for the mobo and one for the rest of the goodies.

Off to seriousland, I think it might be the motherboard if neither of the PSU's will work, but I'm not sure if you can just use a 4pin for the extra 4 slots in a mobo, like you can in a video card.

[n0cturnal]

Hey guys

Need to brainstorm a bit. Hope you guys can help.

I am putting together an old self-built computer. It's a different PSU and casing from last time - but the inside is pretty much all the same.

After putting everything together there's no power anywhere. No motherboard lights and no fans moving when I plug in the power cord and turn the PSU on(switch on the back). I've even tried a different PSU(although this only has the regular 20pin ATX plug and the mother board has 24 pins, which is normal?).

So am I looking at 2 broken PSUs or 1 broken and the other not functioning due to only 20pin ATX plug?

Been googling a bit and cant seem to find out. (I'm prolly just blind, but hey)

Thx in advance.

You could try running just the PSU like this. http://www.youtube.com/watch?v=u0OKmIuNtmI

[Deleted]

You could try running just the PSU like this. http://www.youtube.com/watch?v=u0OKmIuNtmI

Ive never searched my apartment, this hard, for a paper clip before!!

Thanks for the advice - as soon as I find one of those lil buggers I'll test it.

---------- Post added 2012-06-30 at 11:44 PM ----------

Ok - so a lot smarter now!

The old 20pin PSU worked when I "shorted" out green and black with a small piece of wire and the newer 24pin was dead(most likely dead altogether).

Then I found this interesting tidbit.

http://www.smps.us/20-to-24pin-atx.html

So I'm fairly sure I found an "out" and don't have to invest in a new PSU for that old computer

Thx for the help guys.