Gigabyte x99 Gaming 7 Dead?

[Peros Antonis]

Good morning everyone. I came across a problem with my computer and i need your help!
To begin with i have an intel i7 5820k cpu, gigabyte x99 gaming 7 motherboard, 4*4gb corsair vengeance lpx 2666 cl 16 ram, thermaltake smart se 630w psu and evga gtx 970 ftw graphics card
Before 2 days i dissassemble my computer to clean it.. I cleaned everything and then i putted again everything inside the case... i pressed the power button on the case but nothing happened,i pressed the power buttton on the motherboard. nothing.. i jumped the power pins and again nothing so i begin taking things out of the case to troubleshoot..
(At this moment i should point that my motherboar has a power button build in , which is lighting red all the time the motherboard recieves electricity)

Now the problem i discovered...
I took everything out of the case and i left only board-cpu-ram on a test bench. I connected the power supply on the motherboard but when i turn the switch on (on the psu) the red light under the power button on my motherboard(whitch is supposed to be red all the time) lights up for a second or less and shuts off... i re-do all this process but the same every time. the light lights for a second and then turns off...
I tested also the power supply with a jumper and fan works ok.. Does that mean that my psu is ok? and the problem is my motherboard?

 

[_Blank]

What did you use to clean your components?

 

[Peros Antonis]

a normal paint brush as always

 

[_Blank]

If the bristles of the brush are made out of non conductive material or you used too much effort there is a posibility that you damaged your motherboard while cleaning it.You might have just been lucky all the other times you de-dusted your parts out.Its better using canned air.Lets hope your motherboard is not damaged.By the way can you somehow test if your other components are working?