I have just finished building my new rig, however I am totally unable to get the system to post and into BIOS. I have tried almost everything I can think of, and the only points of reference I have are the indicator LED's from my motherboard (ASUS Prime X570-Pro). Each time without fail, the motherboard shows a constant white 'VGA' light as well as a green 'Boot' light. Looking at all the connectors I can see they all appear to be seated and in the correct position, everything lights up as expected and my water pump spins up just fine, however the monitor just stays blank. I am using an AMD Ryzen 9 3950X, 64GB DDR4 memory, a GTX Titan X, and a 1000W PSU (HX1000).
So far I have tried reseating the RAM sticks, tried 2 different HDMI cables coming direct from the graphics card, also tried the motherboard HDMI however I don't think the 3950X has onboard graphics anyway. Also tried reseating the GPU, and with the VGA light being on I thought this would be my issue, however the GTX logo lights up fine as well as the fan spins too. I am currently in the process of clearing the CMOS by removing the cell battery.
I've only built one system prior to this, and I am no expert. Please comment anything that could be a possibility or a fix. TIA