Motherboard won't take power. Power supply wont turn on when plugged into motherboard but will with another motherboad.

[recon5382]

i have an asus P7H55-M PRO motherboard and a ocz modxstream-pro 700w psu. i had bought 2 molex fans and used an adapter on the psu, after that i tryed turning on the computer and nothing would start. no green light on the mobo, no fans spinning, and the psu wouldn't even start the fan. i have tested the psu and ruled out the problem to the motherboard. pleas help ive tried everything i can think of.

 

[Sedivy]

You can't really fix the motherboard when it's totally dead. It's rma or replace.
That being said, simply plugging in two fans into the psu shouldn't have by itself fried the mobo as it's not directly connected to the mobo at all. What might have happened is that your psu is going. Maybe voltages are unstable, outside the acceptable tolerances and mobo may have been struggling already.
http://www.wikihow.com/Check-a-Power-Supply (on how to check voltages on psu)
After adding additional load (though 2 fans is really minimal load wise), it stressed the psu so that mobo ended up dying? That's the only way I can see fans plugged directly into the psu affecting the mobo in such a way. Ideally, it should actually lead to psu dying, and saving the mobo but I've seen it go the other way so it's not unheard of.
You didn't connect the fans simultaneously to the motherboard and to the psu, did you?

 

[recon5382]

You can't really fix the motherboard when it's totally dead. It's rma or replace.
That being said, simply plugging in two fans into the psu shouldn't have by itself fried the mobo as it's not directly connected to the mobo at all. What might have happened is that your psu is going. Maybe voltages are unstable, outside the acceptable tolerances and mobo may have been struggling already.
http://www.wikihow.com/Check-a-Power-Supply (on how to check voltages on psu)
After adding additional load (though 2 fans is really minimal load wise), it stressed the psu so that mobo ended up dying? That's the only way I can see fans plugged directly into the psu affecting the mobo in such a way. Ideally, it should actually lead to psu dying, and saving the mobo but I've seen it go the other way so it's not unheard of.
You didn't connect the fans simultaneously to the motherboard and to the psu, did you?

I connected one fan and it worked then I shut down and tries the next. I believe that's when my something failed. I then tried the other fan and It worked. After that I put both fans in series and that's when I couldn't get my mobo to come back on.

 

[Sedivy]

Er wait. You connected one fan...to the mobo and to the psu at the same time?

 

[recon5382]

the fans are molex and i had used an adapter with the psu.

 

[Sedivy]

The fan wire coming out of the fan directly is usually never molex. It's a very thin wire ending in a small square plastic adapter called 3 or 4 pin (depending on how many pins it has). Some cases will include automatic molex adapters, ie. they'll pre-plug your fan early on into a molex so you can connect to the psu. Sometimes these adapters split giving you the option to connect either to the mobo or via molex to the mobo. If you connected both at the same time ....that's bad. Usually it'll fry just the fan header on the mobo, but it can fry the whole mobo too if it has no protections on the fan headers. Can you take a pic of the wire, showing how you wired it?
Lemme see if I can find some pics so you see what I'm talking about.

 

[Sedivy]

http://sure-electronics.net/Accessories/DC-CL11111_3_b.jpg
this should be what's coming out of the fan.

Then it should be plugged into something like this:
https://www.dazmode.com/store/uploaded/thumbnails/db_file_img_10347_800xauto.jpg
which can be any color, I've usually seen it as white. But it will allow for plugging in that first adapter into it, and then providing both molex and a 3/4 pin connection to then connect to either mobo or psu. Connecting to both is bad.

 

[recon5382]

http://sure-electronics.net/Accessories/DC-CL11111_3_b.jpg
this should be what's coming out of the fan.

Then it should be plugged into something like this:
https://www.dazmode.com/store/uploaded/thumbnails/db_file_img_10347_800xauto.jpg
which can be any color, I've usually seen it as white. But it will allow for plugging in that first adapter into it, and then providing both molex and a 3/4 pin connection to then connect to either mobo or psu. Connecting to both is bad.

the fan is a molex connector. it doesnt connect to the motherboard, only the psu. this is what i boughthttps://www.amazon.ca/gp/product/B00JFLGD7O/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

 

[Sedivy]

Huh you were right. I don't ever see those, but yeah that's going straight to molex, meaning you couldn't connect to the mobo.
You could try taking out the cmos battery on the mobo and replacing it after 10-15 sec, to see if that maybe resuscitates it. I'd tell you to try flashing bios, but if no lights flash on the mobo at all on startup, that's likely a bust as well.
There's only rma/replace then.

 

[recon5382]

Huh you were right. I don't ever see those, but yeah that's going straight to molex, meaning you couldn't connect to the mobo.
You could try taking out the cmos battery on the mobo and replacing it after 10-15 sec, to see if that maybe resuscitates it. I'd tell you to try flashing bios, but if no lights flash on the mobo at all on startup, that's likely a bust as well.
There's only rma/replace then.

ill try taking out the cmos battery and plugging it back in.

 

[recon5382]

Huh you were right. I don't ever see those, but yeah that's going straight to molex, meaning you couldn't connect to the mobo.
You could try taking out the cmos battery on the mobo and replacing it after 10-15 sec, to see if that maybe resuscitates it. I'd tell you to try flashing bios, but if no lights flash on the mobo at all on startup, that's likely a bust as well.
There's only rma/replace then.

popping out and plugging the cmos battery didnt work.

 

[Sedivy]

Yeah it was a long shot. If you try to start up and absolutely no signs of life from the mobo, none of the lights on it try to blink or turn on, it's probably dead.