Computer flash on when turn on, then turn off immediately

Oct 23, 2018
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I have built a computer with this specification.


Ryzen 3 2200g cpu
Asrock a320h-hdv mobo
Vgen tsunami 2x4 2666mhz memory
Apacer m.2 sata ssd storage
Cooler master MWE 450w 80+ psu


but I have a problem when turning on my computer, it’s just blinked (my case led) for a half of second then turn off by itself. I assume that something is wrong with my PSU and I haven’t tried to use another PSU. I have no PCIE power and SATA power plug in because I’m not using VGA card and my storage are m.2 that doesn’t need sata power.

Any help would be appreciated.. thanks. (Sorry for bad english)
 

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