Question MSI B350 Mortar Artic Blinking

Aug 29, 2019
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Hello, there.

I have an issue with my motherboard, here is a video of it and what it does:
View: https://www.youtube.com/watch?v=zWG8-C-f3_4


Sometimes after resetting the BIOS it might show the BIOS or POST Screen for at least 6 seconds (It's pretty much random), I have tested with two different PSU. Problem doesn't seem to be CPU or RAM.

However, I want to make sure it's the MOBO before buying anything that cannot be returned, plus I have shortage of money after some things that happened but I have to continue a project without further delay, so I must have a very specific diagnostic with your help.

Thanks in advance.

Part list:
CPU:
Ryzen 7 1700
MOBO: MSI B350 Mortar Artic
RAM: 16GB DDR4 Corsair Vengance LPX
VIDEO: EVGA 1080 SC
M.2: Evo 960 256GB.
PSU: (500W Thermaltake Smart Series) and (Antec 550W Plus Bronze)