Hi everyone! I just bought a new T5820-5710 it was without any graphic cards. When I install video cards and trying to switch on, monitor do not have any reactions, no any image(Monitor and graphics card is working in another PC) I tried with different graphic cards, but no any effect from it.  The workstation seems like a start (SSD indicator wink and keyboard react on CAPS and NUM lock). Workstation was made in 2018 year, but didn't used before I bought. And what is strange when I just plug power cable to workstation it automatic turn on. What is it can be? 

And another question, now in workstation installed intel core i9 7900X processor, if I will buy i9 7960X, will it is works in that motherboard?