New Build Issues with testing already completed

I went out and did an almost complete rebuild for the first time in forever, new motherboard, cpu, memory, graphics card and case.

After installing the cpu onto the motherboard along with the memory, i tried pluggin my monitor into the motherboard to test that everything was ok before going through and installing the graphics card. I kept getting a beep code with 1 long and 3 short. According to charts for an AMI bios this means a memory issue. I try reseating everything, memory, cpu, power cables, switch cables, etc. the same error keeps coming.

I then go about trying the memory in different slots, same beeps. I try each of the individual memory sticks in each slot with the same result.

After this I try removing the memory all together and turn on, i now get no beeps at all when it should be beeping to indicate that there is no memory. The last thing i try is to reset the CMOS to no avail.

I have come to the conclusion that it is a motherboard or cpu problem but i cannot get back to the shop i purchased it at until monday now. I also do not have any spare components of motherboard, processor or memory to swap out to test. I am posting this here in hopes that i have completely missed something obvious and i can get my new machine up and running before the end of the weekend.