HiWhen I search that CPU Google sends me here:
Intel® Core™ i5-9400F Processor (9M Cache, up to 4.10 GHz) quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.ark.intel.com
Is that your processor? If it is ...see the F on the end? Noi graphics card built in
Thanks for sharing the JPG of the CPU you have. That one has a built in graphics card so you could go either way. Graphics or no graphics when testing. I have run into a few systems that are lazy to POST because of RAM and I have run into issues with the monitor not switching to the right input. I have also seen a few situations where the board is set to go to the wrong video card. If you have a graphics in, you could have tested either video port to see if signal was going somewhere.We also had a graphics card before, and it was working but then it stopped working. We used another new board with the graphics card and it worked, so we assumed that there must be a problem with this board. I am trying to upload the video of what happened but it seems to be too big for the server to process.