PC Build not starting properly, Fans spins less than a second

FairyClaus

Honorable
Nov 11, 2013
11
0
10,510
Hello,

Okay so I have a pc build which I have had runnimg smoothly for months now. Today.. all my parts for my second build have came in, an I had planned to switch out a few parts between the two.
Those parts being the CPU, GPU, PSU

My build that has been working is..
CPU: AMD A-10 5800k Apu
Mobo: FM2-A75MA-E35
PSU: Logisys 350w
HDD: Crucial M4 ssd
RAM : 8gb Corsair 4x2

Now I switched out a few parts on the build and made it look like this and it ran just fine, started up and used it for most the day

CPU: AMD Athlon X4 760k
Mobo: same
PSU: Logisys 550w PS550E12
HDD: same
RAM: sams
GPU: Radeon HD Ax7790

It ran fine but I decided I didn't really like the new build and wanted to contine to just use all the parts I switched out for a second pc instead. (just reverting everything to how it was listed on the working build)

however now I can't get the pc to boot up, nor beep. The cpu fan spins for less than a second and nothing else comes on, not even the hdd or power lights.

I've read i'd say 50+ threads that had similar problems, but all lead to nothing happening. I've even read and walked through the troubleshooting sticky threads about no booting or starting pc's.

I have two psu's correct, and both have been used successfully today. Two cpu's which both have been used successfully, as well as tried to boot up both cpu's and psu's in all combinations. Yet no change except slight cpu fan spin.

Both cpu's have thermal paste applied.
The CMOS has been reset by both pulling the battery and using the jumper.
Tried using the GPU in and out while using different CPU's, due to one being a APU.
All wires have been troubleshooted and mobo guide checked for any wire placement issues. including power switch wires.
I also have two mobos of the exact same kind, one which has been working just fine and a brand new one out of the box for first usage today. both have been tried.

all troubleshooting gives the same "nothing", an a slight cpu fan spin.

any suggestions on what could be the issue? i'm going to take everything out the case and reassembel the whole thing again using the old working build again.

Any help would be awesome and suggestions as well, thanks to all in advance [:
 

FairyClaus

Honorable
Nov 11, 2013
11
0
10,510
Solution! Check those wires! I've had issues with wiring this specific Mobo right for some odd reason and I seemed to wire the system fans wrong again. Newbie alert :D
 

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