I wouldn't even know what to look for in the event viewer.
At least, give it a try ! - There are several TABS in event viewer. View each one. Critical errors have a RED X. Informational notes have an "I".
You may get lucky and see something you can understand, but the messages are Microsoft Cryptic ! (Thanks Gates)
But I am guessing it is a hardware issue dealing with onboard connection of the Power supply to the MOBO.