New PC build turning on but no boot (please help)

Mar 24, 2018
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I have already built multiple pcs before but have never encountered this problem. I built a pc for my friend, it was a budget build, with a ryzen apu and no gpu, i built everything and set it up and finally went to turn on the pc, fans spin, powwr led is on, cpu fan also spins, not feeling any hdd activity, psu fan spins, and somwthing i noticed, is that not all the time, but sometimes when i first turn it on, the rgb lights under the mobo flash briefly and then go off immediately after (using this mobo). I tested if the problem is with the display input by connecting a keyboard and chexking the caps lock light and so, but no signal, so i assume it didn't even boot yet. I will be chexking if the problem lies with the ram by putting them into my own pc, and will be getting back to you.

Here are the full specs:
Mobo: Gigabyte GA-AB350N-Gaming WIFI
CPU(APU): AMD Ryzen 3 2200G
HDD: Seagate - 500GB 5400RPM Hybrid
RAM: Team - Vulcan 8GB (2 x 4GB) DDR4-3000
PSU: EVGA - BT 450W 80+ Bronze
Case: Cooler Master Elite 110 Mini ITX

Any suggestions on what the problem is? Thanks for all your help!
 
Mar 24, 2018
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i found a solution, as scout_03 said, i need to update my bios using a different cpu first, but i found out that you can sign up on amd's website to be sent a free cpu to be able to update the bios and then send it back. i applied here