Need Help Mobo wont post.

[IamaWizard]

So recently i wanted to rebuild an old pc to use it with my tv. And while rebuilding it i manged get into windows and its boot menu but did not have time to finish the startup so i took everything apart.

Fastforward a few weeks and i wanted to rebuild the pc again and for some reason my motherboard will not power on. I have not changed any of the components. I have tried the mobo with a different PSU to check if that would be the problem but nothing changed. After making sure that none of my pins in on the mobo are bent and the contacts on my CPU are also clean, i tried to clear the cmos but nothing has changed. 

I also chenged the mobo if maybe a capacitor or something else looks wrong but to me all seems fine. I have also tried to jump start the mobo but there was still no effect none of the fans spun up. 

 

 

Here are specs that i am using

 

Mobo: Gigabyte B150M D2V

CPU: Intel i5 6500

RAM: Ballistik DDR4 2666

 

[Bombastinator]

If it worked when you took it apart and then didn’t after you put it back together highest likelyhood is it wasn’t put back together right. 

[IamaWizard]

Well this is not the first PC i have built and i am very sure that it has to do with motherboard. I just hoping someone here maybe knows something that might help me. It is just wierd that it worked but not nothing seems to happen (not even any fans spinning) when i try to power it on. 

[Beerzerker]

Chances are you made a mistake during the reassembly causing it to go into "Protect Mode" once power is applied via the PSU in that the PC is detecting something it's not liking and refusing to boot because of it.

Go back over the build, check it carefully to see if anything is amiss. It's also possible a component is failing such as a stick of RAM causing the same symptom. Even if you've built them before it's still possible to make a mistake, I've built and torn down so many I can't count them and I still make goofs once in awhile - It happens.

 

Example:

Not long ago I plugged in the 4 pin CPU power plug wrong, even though it felt like it was OK the PC was doing the same exact thing yours is now, pressing the power button had no effect and I knew it had to be something simple/stupid I had done.
I checked my connections and that's when I found it.
My PSU has a single 8 pin and a split 4-4 pin CPU power plug, I had plugged in the wrong half of it. Normally this isn't possible since the plug is molded so it can only go in one way and only the correct half can go in too BUT turns out if you have the other side of the split plug turned 90 degrees one way it will go in and even feel like it's OK but it's not. After spotting this I simply used the other half of the split plug, made sure it was oriented correctly to the latch/hook and it fired up.

Check it over and tell us what you find if anything.

[IamaWizard]

Thanks a lot  i will will give it a try and see how it goes. 

[Beerzerker]

One other thing I thought of is to check the main 24 pin ATX plug and make sure none of the pins are pushing up/out from the plug itself. If one is loose and pushing up in the plug when you plug it in, the ATX plug is not fully connected and the system probrably won't work.