"post" is when the computer boots into bios when it first starts. There will be a motherboard splash screen when your PC starts up and then you press "delete" to enter bios. So once you get that splash screen and are able to enter your bios, your computer has "posted".
A "no post" scenario means you can't even get to bios. So then the bios will need to be reset to defaults to get it to post again.
Some mother boards these days (probably most) do have a retry system for no-post due to ram error, and it will retry a few times then reset itself automatically. I have the B350 Mortar, which is a couple steps up, and mine will reset its settings after 5 failed tries (or used to when I had the old bios, lol, not sure if it still does - I think so)
Yours probably will do this also, but every once in a while, usually when you really accidently set the ram settings too far out, it just won't recover from this and won't post. At that stage you need to do a "bios reset". Your reset button on your case is not the same.
mine was a jumper, so I imagine yours is too. You would have to take off the panel, find the right two pins, and short them with some metal, (like a screwdriver tip, or an actual pin jumper if the mobo came with any) - this resets the bios.
Once you know how to do this, you can recover if you screw something up and can't get it posted into bios.
MSI has a guide with a quick video here:
https://forum-en.msi.com/index.php?topic=31222.0
After you feel you know what to do or can access that guide with your computer off, you can feel a bit more confident about the ram tuning.
What RAM do you have specifically (brand / model) ? I might be able to suggest some settings to try ...