Motherboard power without CPU

Guitarinpool

Distinguished
Jun 19, 2011
5
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18,510
Do some motherboards require the CPU to be inserted in order to power on?

I have an ASRock pro 4 mobo and all I'm missing for my build is my processor. I jumped the PSU to make sure it was working, and it worked. I had it powering the fans and drives too. It all worked, but when everything was connected to the board nothing happened. Does it have to have the CPU? Or do I have a problem..