PC wont boot at all

[Chambersofsecret]

I have a PC that I had replaced the motherboard, and was going to test to sell, but it wouldn't boot.  It did turn on for a second when I accidentally unplugged a fan from a 3 pin port (now that I think about it thats probably not actually a fan port), then Immediately shut off again.

specs

Dell Optiplex 390 Motherboard

i5 2500k

16gb ddr3 1333mhz

240gb ssd (Windows 10 pro)

500gb HDD

gt 1030

EVGA 450w psu

1x case fan

2x rgb UpHere fans

[Applefreak]

Can you mark where you plugged the fan in:

 

 

Here is the explanation of the motherboard:

 

[Chambersofsecret]

3 hours ago, Applefreak said:

Can you mark where you plugged the fan in:

 

 

Here is the explanation of the motherboard:

 

 

[Applefreak]

That should be the clear cmos jumper, is the jumper missing from the connector? 

[Chambersofsecret]

1 minute ago, Applefreak said:

That should be the clear cmos jumper, is the jumper missing from the connector? 

ya

[Applefreak]

There is a support guide over at Dell. Here is the link

It's a bit difficult for me without having the board in front of me to diagnose. The only thing I can thing of and I have no idea if that's even possible, but if you plugged in a fan into that connector, you could have drained the battery. If Dell checks the battery voltage, maybe it' won't boot because it dropped too far. That could be tested out by just replacing the cell with one from another board.

[Chambersofsecret]

1 hour ago, Applefreak said:

There is a support guide over at Dell. Here is the link

It's a bit difficult for me without having the board in front of me to diagnose. The only thing I can thing of and I have no idea if that's even possible, but if you plugged in a fan into that connector, you could have drained the battery. If Dell checks the battery voltage, maybe it' won't boot because it dropped too far. That could be tested out by just replacing the cell with one from another board.

OK thanks for the advice, this is Dells fault for being a crackhead at designing ways to contain batteries, but the board is now bricked