Yeah we have a speaker plugged into the motherboard, not a single beep. Turns off for like a second, then instantly off, I feel like it's PSU problem. That's what a lot of people seem to have.
Not a single beep can't be good. Should get one quick beep from the mobo speaker. Plug in the CPU, CPU cooler, RAM, and GPU. Then attach all the PSU cable. Once you turn it on with a paper clip after a second or 2 you should hear a single beep.