New build. Question: MBO or powersupply dead?

[fireflyva]

Hello,
I just installed a new MBO MSi A75A -G35 and installed new power supply, and plugged in power connection to MBO. Nothing happens when I turn it on. I performed the paperclip test on the power supply and the fan turned which it did not do when plugged into the MBO. However, I have no lights anywhere that are lit. Question: how do you know if it is the power supply or motherboard which is the problem?

I don't know if I am in the correct forum so if I need to be moved please do so.

Thanks.

 

[alexoiu]

Hi, have you connected both 24 and 4-pin power connectors? Are the case reset and power switches correctly connected to the board's header?

 

[fireflyva]

Hi, have you connected both 24 and 4-pin power connectors? Are the case reset and power switches correctly connected to the board's header?

No, I guess not. My power supply came with a 24 pin connector but not a 4 pin connector in the configuration that the MBO has listed. I do not have a 4 pin connector from the power supply in the orientation that is listed on the MBO diagram. I "assumed" that the 24 pin connector was the only power supply connection needed to the MBO. Is there supposed to be a 4 pin connector as well as the 24 piece power supply connector?

Thanks for your help.

 

[C12Friedman]

There may be an 8 pin ATX connector on your PSU (possibly a 4+4 pin - NOT the 6+2 or 8pin that says PCIe!), if there is an 8 pin ATX you can use it on the 4 pin ATX on your motherboard, it'll just hang over nothingness a little

 

[alexoiu]

No, I guess not. My power supply came with a 24 pin connector but not a 4 pin connector in the configuration that the MBO has listed. I do not have a 4 pin connector from the power supply in the orientation that is listed on the MBO diagram. I "assumed" that the 24 pin connector was the only power supply connection needed to the MBO. Is there supposed to be a 4 pin connector as well as the 24 piece power supply connector?

Thanks for your help.

Yes, it is, otherwise the CPU doesn't work. I assume that the CPU fan does not spin. What's the model of the power supply?

 

[fireflyva]

You are correct, the CPU doesn't work and the fan does not spin. Here is the link to the power supply:

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=899123&CatId=1079

Thanks for your help. This is a bit overwhelming.

 

[alexoiu]

The PSU has a 8-pin and a 4+4 pin power connectors. Connect one of the 4+4 pin to the board's EATX connector.
http://www.playtool.com/pages/psuconnectors/connectors.html#eps4plus4

 

[fireflyva]

The PSU has a 8-pin and a 4+4 pin power connectors. Connect one of the 4+4 pin to the board's EATX connector.
http://www.playtool.com/pages/psuconnectors/connectors.html#eps4plus4[/quotem

Sorry for this question - it is probably stupid question, but does the 4+4 pin layout lookout like a retangular 8 pin plug? If so, I guess 4 pins just are not connected? Sorry for this obvious question but I am a bit of a newbie....

 

[fireflyva]

You are correct, the CPU doesn't work and the fan does not spin. Here is the link to the power supply:

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=899123&CatId=1079

Thanks for your help. This is a bit overwhelming.

 

[alexoiu]

The PSU has a 8-pin and a 4+4 pin power connectors. Connect one of the 4+4 pin to the board's EATX connector.
http://www.playtool.com/pages/psuconnectors/connectors.html#eps4plus4[/quotem

Sorry for this question - it is probably stupid question, but does the 4+4 pin layout lookout like a retangular 8 pin plug? If so, I guess 4 pins just are not connected? Sorry for this obvious question but I am a bit of a newbie....

Yes, they can be connected together or separately. Plug one of the 2 connectors. Pay attention at the shape of the pins (round and squarred) so that the position matches the motherboard's connector.

 

[fireflyva]

OK - thanks so much. I will be able to try this tonight when I get home from work. I'll let you know how it goes. Thanks again for the help.

 

[fireflyva]

Best answer selected by fireflyva.

 

[fireflyva]

Yes, they can be connected together or separately. Plug one of the 2 connectors. Pay attention at the shape of the pins (round and squarred) so that the position matches the motherboard's connector.

Alexoiu -

Thank for the information. It worked just as you said. I also found a few other problems along the way I was able to repair but your advice took care of the problem. It is up and running well now. Thanks again.