I'm building my first new PC in a few years. i am on my second Asus B550-Plus mobo. connecting to power supply (only) and shorting power switch pins does nothing. the RGB strip near the 20 pin block cycle colors. i have my old 990fx board and doing the same with 2 different power supplies (600w and 750w atx compatible ) works as expected in both cases. Asus support was 0 help. i figure i must be doing something stupid, Asus have been reliable in the past and having two of them being bad in two days is pretty horrible luck. Thanks in advance.