Who can help me with Pc assembly problem

Geo_All

I have many years in IT, I have assembled and repaired many computers and servers, but at this moment I feel frustrated, it had never happened to me, I told you motherboard Asus tuf Gaming Z790-Plus wifi, intel Core processor i9-14900k, 32GB of RAM, something so easy to assemble, I put it on and it did not turn on, I thought it was the power supply, so I bought one of 1000W, they changed all the combo of motherboard, cpu and RAM, now without assembling it in the case I tried it, the power supply turns on some seconds, I thought it could be bad the power supply, so buy another always 1000W, but the same thing happens, I tried the memories, in fact buy another 2 of 64GB (2x32GB), I tried 1 by 1 in each memory bank, but it continues the same, it does not give video, it does not whistle, what happens that could be the Motherboard or CPU, but already testing with 2 different ones will be possible that they have the same problem?, or what can I be wrong?