Have you tried disconnecting the power switch connector and using a screwdriver to fire up your computer, you must remove the screwdriver as soon as it starts up.
This will show if it is the start button or not.
AMD Radeon Adrenalin release date, new features, compatible graphics cards
8 brilliant character artists speaking at Pictoplasma 2018
iMac Pro release date, UK price & specs
Football : comment regarder la Ligue 1 en direct ?