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Question Motherboard won't start unless I jump it

May 28, 2020
Exactly as it says in the title. I've tried powering it on with 1 Ram stick, 0 RAM sticks. No CPU, no video card, it just wont power on, no lights no fans. When I am able to power it on, it'll only start when I jump it with the CPU in, and when it does the CPU light flashes even though it is seated correctly.
Motherboard: MSI B450 Tomahawk Max
CPU: AMD RYZEN 7 3700X 8-Core 3.6 GHz
Videocard: MSI GeForce RTX 2080 DirectX 12 RTX 2080 AERO
RAM: Corsair Vengeance LPX 16GB
PSU : MasterWatt 750 Watt Semifanless Modular Power Supply, 80 PSU: MasterWatt 750 Watt Semifanless Modular Power Supply, 80 PLUS