Hello people,
here is my problem : since some days I cant turn on my CPU anymore because i've got no screen signal at all.
So I tried some things (like switching the RAMs slot, booting with only 1 RAM, the proc & motherboard, etc) and since that I got this strange things with all the red dots lighting up succesively, until they stop & the "boot device led" remains on (you can see video here : https://drive.google.com/open?id=1QElVZNqKxwX3rKa0pGHL2m8RqjM3JRdU )

I dont see anything about that in the manual. Does anyone have a clue about what the problem is and what I could possibly do ?
Many thanks