LG 23MP47HQ - No HDMI signal

[NikolaNidza]

Hello everyone, I have just built my PC and when I connected monitor to PC using HDMI High Speed cable I got message:
HDMI
No Signal
Entering power saving mode...

Monitor has HDMI and VGA ports, VGA cable comes with monitor but I bought HDMI because on motherboard I got HDMI, Display Port and DVI-D.
GPU is sent and should arrive shortly but again it has same type of ports.

I tried to do troubleshooting myself:
1. Tried to connect with HDMI with 2 PCs and 1 Laptop - None worked
2. Went to store and changed for new HDMI - Repeated step 1 and again same results
3. Old PC has DVI-I so I bought adapter from VGA to DVI-I and when connected monitor works.
4. Connected new PC to friends monitor using his Display Port+Cable and verified that my PC is booting up.
5. I unplugged HDMI from PC while monitor is working and I get message:
No Signal
Please check your connection

NOTE: There isn't source button bellow to change for different inputs.

UPDATE:

Monitor port or cable isn't problem, now confirmed that it works by using GPU HDMI port on friends pc.

Now I suspect that my PC might not be setup properly or that HDMI port on motherboard is broken or something along those lines.

Is there way to fix this somehow or I should try to RMA it?

 

[NikolaNidza]

Don't bother answering, monitor is working properly, for everyone having similar experience I suggest checking with other PC but charging out monitor before trying(pull out cable and press power button to draw remaining power), now there is problem with PC that I need to solve.