Hello, Reb00tas.
In general, it cannot boot without a CPU.
Do you have any Q-LED indicators that are lit?
If so, please refer to [Motherboard] ASUS motherboard troubleshooting via Q-LED indicators and follow the steps to troubleshoot.
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https://www.asus.com/support/FAQ/1042678/At the same time, please refer to [Motherboard] Troubleshooting - No Power/No Boot/No Display to troubleshoot problems that cannot be successfully booted,
including trying to clear the CMOS and testing with minimal components, isolating the possible cause.
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https://www.asus.com/support/FAQ/1042632/If there is an inoperable part of the process, please let me know which is it.
Thank you.