Thanks for the update and you are most welcome
Even if you have built a system before, my procedure may make it less of a hassle, a bare bones setup.
If your case comes with an I/O shield already installed, remove it by pushing it into the case, then fit the one that comes in the MB box.
Install the PSU.
Place the MB on the empty box, close to the side of the case.
Install the CPU/heatsink and fan, connect the fan to the CPU header on the MB.
Install the RAM in the correct numbered slots.
this is optional to test for DOA parts.
connect the keyboard/mouse to the top two USB sockets on the MB, or the PS/2 socket.
connect the monitor.
Connect the two main power cable to the MB.
Connect a mini MB speaker.
Switch on the monitor, you should see "No Signal" displayed.
Switch on the PSU, if the MB has a power button, press it, if not, with a small bladed screwdriver, briefly short out the two power on pins on the MB case header
PSU/CPU fans spin up and POST is started.
Lights on the keyboard flash once.
Your RAM should be detected and the mini speaker beeps a code, see your manual for the meaning.
Providing you display does not report, "no Memory Detected" you are good to proceed.
Switch of the PSU, disconnect all cables except the CPU fan.
Check the standoffs on the MB mounting plate that they match exactly the number and pattern of the screw holes on the MB, no extra ones.
Install the MB and carry on the build.