The CPU is installed with the heatsink fan on top. The 24 pin main power cable is attached and I can start the unit and CPU comes on and the LED lights are also on my my case. I did not have the CPU 4 pin connector connected. My power supply only had an 8 pin bit it was marked with "CPU" on it.
I installed the cable and couple of things

1 - The CPU fan would start on high then go on low, but would slightly surge in speed (not much every 2-3 sec).
2 - When this CPU power cable was installed I saw no LED light for the Ethernet. I then Unplugged (after the power was off) and then restarted then I saw the ethernet lights blink (not like it was receiveing data though).
3 - There were no BEEPS when I started the unit in either case and still no Boot.

At a loss still.

Thanks for the advice. I tried the HDMI and DIV ports on 2 other monitors and nothing. I also reset the CMOS as well.

The fan on the CPU works fine too. One thing I did notice is the socket on the motherboard is very deep in the middle and I cannot see how the CPU touches the middle portion.

Do you need a CPU to boot the motherboard? I am looking at options to do a process of elimination. Similar to the RAM.

Looking for assistance. I set up a new PC and cannot get the boot screen to load for the motherboard on a brand new start.

I am using an HDMI cable to my tv. I have tried this and also on a monitor and get no signal coming from the HDMI cable.

I am truly at a loss. I have built other PC and never had a startup issue. Also, do not have a CD drive so if I missed something and need a USB start up for the software slap me now! :-)

I have compatible memory and processor:

Kingston HyperX FURY Black 8GB Kit (2x4GB) 2133MHz DDR4 Non-ECC CL14 DIMM Desktop Memory (HX421C14FBK2/8)

Intel BX80677G3930 7th Gen Celeron Desktop Processors