No Post / display signal

[SynergieOfficial]

Hi,

I'm building a new system for my company. its in a 2U chassis and it has the following specs

CPU: I5 6700K
Mobo: Gigabyte H170M-H3D
Ram: Hyper x Fury DDR4 2133 CL14 (2 dimms) 8GB
PSU: a 2U PSU came with the chassis 600W 80plus gold (picture

 

 

So this is not my first rodeo, build a couple systems in the near past and haven't had a issue other than a faulty stck of ram.
Anyway i connected everything like it should and it powers on alright, fans spinning HDD spinning up like it all should , but i can't manage to get a display working nor the POST "beep" ain't comming (yes i connected the buzzer). Also to test if the buzzer was workign i booted with no ram and it made the alternating beeps, so the buzzer is working fine.

Here are the things i alreasy tried to do to troubleshoot:
- Disconnencted the GPU
- Disconnected all PSU cables and reseated them
- Reseated the CPU added new termal paste to the stock cooler
- reseated the 2 ram sticks
- tried both ram stick individually
- tried 1 ram stick in every slot possible
- connecting an other PSU
- redo the entire setup on the mobo box
- pulled out the mobo battery , and put it back in
- tried to booth a windows stick
- tried the different onboard display porst (VGA , DVI , HDMI)
- tried different GPU display ports ( 2 x display, 2x HDMi , 1x DVI)
- only the HDD connected
- only the SSD connected
- No hard drive at all
- tested with a working windows installed HDD

And yes i read the NO post/No Display topic and most of it i've done as listed above

Thats all i could think off to troubleshoot.

Am i forgetting something or am i'm sitting on a defective component ?

Anyway thanks for the help.