Question My PC is plugged in to the power but NOT YET 'ON' and the FAN are already spinning

Jan 17, 2022
Hello guys, I'm a 20 yo, i don't have that much knowledge abt computers and the boards, so i am asking for help.

So i tried messing with the computer and installing another 1 hard-drive coz of the files inside there that i wanted to see on the computer too but the moment i turned it on, i see smoke and i quickly unplugged all.

I unplugged the 2nd hard-drived i somewhat installed. But when i plugged the power cord again, the fan starts to spin and i haven't turned the CPU on but when i press on the power button it turned ON normally and aswell the green light but the screen won't show any display.