Ok so I got the suggestion to bypass the power switch a jump the PSON and GRD to see if the board would show any signs of life. The cpu fan started up but before i could check anything else a mosfet lit up like a candle. Any idea what this one controls the best guess I have is the 5v usb. Would this being shorted be causing my board not to start?

Hello I have a msi mag b660 wifi ddr4 board that I’m unable to get to power on. Ive bought it off a auction site so no history on the board and no warranty, got it super cheap, trying to make a budget build and it backfired.

I’ve tried to jump the power pins and also hook up the power switch from my case and no signs of life.

i have jump the power supply while not connected to the board to confirm power supply is good and it is.

I have installed the cpu, ram and graphics card than removed them one by one to rule out them as a fault.

im...