I mistakenly connected my FDD adapter to the Sys_FAN4_PUMP port
I mistakenly connected my FDD adapter to the Sys_FAN4_PUMP port
Can't be certain without trying. Testing might require changing components until it works.
We connected both the mainboard and the power supply together, which probably means one of them is faulty. Because the PSU has safeguards, the mainboard seems more likely to be affected.