Should my case fans be spinning if i don’t have my CPU and GPU?

omg1123

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Dec 31, 2017
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So I started to build my PC last night without my Ryzen 5 1600 and my GPU. I connected all my parts but my case fans are simply just not spinning when I have my PSU turned on. The motherboard I have is the Asus astrid ROG B350, and the motherboard lights up. Should my case fans be running without my CPU and GPU?