I used my desktop last night with no issues.
Started it up this morning and no joy !
This is a home built desktop about  1.5 years old
Asus Prime X570 Pro Mobo
AMD Ryzen CPU...I think its's a 3700 3.6 GB
G Skill RAM 32 GB
M.2 512 GB. HD

When I push the start button the fans and RGB all light up and run, the " Boot "  LED on mobo comes on and stays lit.
I get no activity light light blinking on the case or the usual sounds of it thinking( starting).
No beeps, no monitor activity , except one monitor will have the blue power light , the other orange.
I switched the RAM to the other set of rails and the computer does a short start cycle, shuts off and repeats, with no monitor activity.

How do I proceed to ...I don't have any spare memory sticks.
I think it could be the M.2 drive but not sure.

HEP !

.223/ 30/06
45lc
45/70
Either should do

I recently had a similar problem that turned out to be one of my graphics cards.  Ran normal once I unplugged the faulty card.

Well I got it going.
I plugged in the Windows 10 Pro install USB and started it up...it took a few minutes but ti started.
Then ran update and checked memory and all that stuff.

I am going to shut it down and go into the set up and see if anything has been fucked up.I checked the BIOS version and it is up to date.