Question New build on a ASUS Prime X470 Pro-AMD boots but no video

Feb 23, 2020
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I am hoping someone might have a suggestion.

I am on my 3rd or 4th build with this case, and 1st with an AMD processor.

ASUS Prime X470-Pro Motherboard
AMD Ryzen 7 2700X Processor
Corsair Vengeance LPX 32GB (2X16)
MSI AMD Radeon R72402364P Video Card

I've finished the build checked and made sure everything is seated well, it boots up and the case (heatsink) lights up, but nothing to the Monitor.
On the initial build I found out the Processor doesn't support on board video, so I purchased the video card. Still nothing, so I called ASUS Support and was told the memory I had wasn't supported by this board. I replaced the memory with 2 sticks of 16GB that is on their compatibility list. No video.
I sent the Motherboard back and replaced it with the exact same, same problem.
I've tried the RAM (1 stick) in different slots, and nothing.
I've run out of ideas.
Has anyone else run across this situation, or have any suggestions? Since I replaced the Motherboard, could it be the Processor?
Thanks in advance for any tips.
Tim
 
I have this mobo and this memory, though I'm using a Ryzen processor with built-in graphics.

It won't work if the memory is in either of the B slots. Try putting them in A1 + A2. That is the only way I could get it to boot. It will see all 32 GB, but of course it won't be in dual-channel mode. I'd love to hear if that works for you too. (I also replaced the motherboard and the memory to no avail.)

My thread about this is over here: https://forums.tomshardware.com/threads/asus-prime-x470-pro-strange-memory-problem.3577927/