The reason why I didn't upload videos....
My PC dies due to cleaning with water.
Before saying me an idiot, I'm gonna explain:
Before I washed it with water+detergent mix, I disconnected everything, which is CMOS battery, processor, and chipset heatsink. After washing, I'm using WD-40 look alike spray, and let it dry. Probably didn't dry enough.
At one point I connected the power supply and light on mobo didn't turn on. Now it's dry, it turns on. But the PC didn't work. Hitting power button only lights up the led. It's my fault, thinking it's very dry.
I don't feel a smoke/burning electronic smell, which is odd. My first reaction after plugging in PSU is try to smell magic smoke.
I washed motherboard previously and it worked just fine... With same method.
GPU and RAM still fine. Model is HP Z200 sff (specs on about section)
Lemme know which part has been short-circuited.