Question newly upgraded pc wont start.

Dec 4, 2019
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I recently bought a new ryzen 7 2700x and motherboard to upgrade my pc. Once i put all of the parts together, it never posted and i can not get output to my monitor. It only stays on for 10 seconds and then it restarts itself in a loop.
 
Dec 4, 2019
4
0
10
it is a ryzen 2700x, a single stick off 8gb ddr4 2400 ram, a asrock steel legend b450m, a gtx 1050ti, a 1tb hard drive, a 250gb ssd, and a 500 watt power supply.