Thanks for the info
Instruction may be a bit pedantic for you, having some building experience, but are given so a beginner reading can follow along.
A bare bones setup will be best for troubleshooting.
Always turn off the PSU when working on the computer and take anti static measures by briefly touching a bare metal part of the case, do this even when handling parts.
As you hear no beeps, check the speaker on another computer or use a know working one.
Turn off the PSU.
Disconnect all wiring to the MB.
Remove the GPU and RAM.
Grip the CPU cooler and, very gently, rock it corner to corner. It should be firmly in place with no obvious movement.
Remove the MB from the case, turn it over and inspect the four locking pins from the cooler. MB manual, chapter 2 page 4. (2-4)
Place the MB on the MB box close to the open side of the case.
Check that the CPU fan plug is plugged into the CPU-fan, not CPU _opt.
Reinstall the RAM.
Connect two power cable, 24 pin and 8 pin. (1-4) #1.
Install the system speaker.
Connect a keyboard/mouse, using PS/2 or USB 2.0, not USB 3.0.
Check the ez-xmp, epu, tpu switches are in the disable position, (default)
Switch on the PSU and press the power button MB, (1-4) #21.
Fans should start and POST begin.
Keyboard lights flash. other MB lights flash, Post ends with a beep code??
What other LEDS lit on the MB?
What Q-code displayed? (1-4) #25.
Press the power button, turn off the PSU.
If the above is a fail, try again without the RAM installed, if OK, try again with the RAM in a different slot.
If a total fail. Remove the cooler, remove the CPU, inspect for damage and/or bent pins.
One item I missed. the product code for the RAM, or a link to the store please.