Can computer do POST without a CPU?

Can you plug a power supply into a motherboard with no CPU and power it on? Would you ... You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should ... Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST. read more

NO computer I know of can successfully complete its POST (Power On Self Test) without a CPU. As Quora User said, some newer motherboards can get into the BIOS/CMOS settings without a CPU installed. But, a proper POST & boot-up won’t happen without the CPU. read more

POST requires the CPU. Perhaps some special mobos can do something w/o CPU, I've never seen that. No CPU = no sound, no video. You could get the power LED on and the fan on (and maybe a click when the speaker gets a DC spike), that's it. With CPU and no memory, typically you get a beep code. Ditto with CPU/memory and no video. read more