Fried motherboard by wrong connection?

[stxs123]

Hi,

I built my own system with a GIGABYTE H87M-D3H motherboard and all went well. Almost everything was connected, the system was running, leds on, fans on, hdd working, I even installed Windows on the hard drive, etc.

At some point I turned off the pc (and PSU) and tried to connect the last wire that was unused, i.e. a wire coming from the case with the letters (VCC D- D+ GND GND). I put it on the F_USB1 connector of the motherboard which has two rows of 9 pins total (four pins at first row, five pins at second row). The (VCC D- D+ GND GND) wire has 4 pins and I put it on the first row of the F_USB1 on the motherboard (that's what I read online).

So after that I turned on the PSU, and then the pc. It turned on for one second and it went off.... Now no matter what I do (I removed many of the cables in the m/b) I can't turn on the pc. Nothing happens, no leds, no fans working, nothing.

Does that mean that I connected incorrectly the VCC D- D+ GND GND wire and damaged the motherboard?

 

[Karsten75]

Removing "Most" wires don't tell us much.

http://www.tomshardware.com/faq/id-1753671/bench-troubleshooting.html

 

[stxs123]

Right now the connected cables are the two power connectors (24-pin and 8-pin), the cpu fan, and the front panel connectors. Nothing happens...

 

[stxs123]

Turn the power off at the wall , count to 10 and turn it back on again. try again. .

Just tried it, no change...

 

[stxs123]

Come on people give me some help here....

Was the VCC D- D+ GND GND cable wrongly connected?

Which parts are damaged, is it the motherboard, the PSU, the CPU?

 

[el_Fenix7]

Please use the guide that Karstan75 posted, and tell us the results. We cannot see the computer so we have to have you complete the tests it has.

 

[stxs123]

Please use the guide that Karstan75 posted, and tell us the results. We cannot see the computer so we have to have you complete the tests it has.

I did follow the guide, nothing is working. I have also removed everything, all cables, hdd, RAM module and left only the 2 power connectors and cpu fan connector on, but still nothing happened.

I also checked the PSU with the paperclip trick and this actually works (fan is spinning) so I guess the problem is with the mobo (and maybe the CPU?).

 

[Karsten75]

so I guess the problem is with the mobo (and maybe the CPU?).

Yes, I guess your guess is probably correct. Sorry for your loss.

Inspect the mounting surface and pins on the CPU chip. If the pins are all intact and there are no scorch marks, you may have a reasonable chance that it's only the motherboard.

 

[stxs123]

I will check it as soon as I can. I just don't understand why it happened. The cable is for front panel USB and it seems that I plugged it correctly. I'm so terrified now that I think I will avoid using it on my next mobo......

 

[Karsten75]

If at all possible, contact the case manufacturer. If their cable caused it, you may be able to get some relief from them?

 

[ccampy]

You removed everything but the CPU and fans and power conecter? It won't boot like that you still need at least 1 ram stick connected