B450 aourus pro wifi not booting

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when i turn the power supply on the motherboard light flashes then turns off immediately.i know it is not a cpu or gpu problem cause i tested them but all of these are new parts pls help

 

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memory: t-force vulcan z 2x8gb 3600mhz
psu: evga br 500w 80+ bronze
gpu: zotac gtx 1660
case: nzxt h510
cpu: r5 3600
cooler: stock cooler

 

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i tested the memory and it didnt fix it

 

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yes it did

 

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i tried resetting the cmos

 

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ok btw how do i test if the psu is bad

 

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i reseated the cpu + cooler still nothing and no pins are damaged